Home Staging With Pets: Testing Dog Smell You Can't Smell (2026)

Written by FUROMA Research Team · Last reviewed: July 22, 2026 · 14 min read

TL;DR

Home staging with pets starts with a problem no cleaning checklist solves: you are the one person who cannot assess the result. Dalton and Wysocki (1996) ran a single odorant inside people's own homes for two weeks; afterwards their detection threshold for it was elevated, and for most subjects the lost sensitivity was still measurable two weeks later. Borrow three noses, remove the source, then add scent — in that order.

Table of Contents

1. Why can't you smell your own house?
2. How do you test an odor you can't smell?
3. What is a buyer's nose doing at your open house?
4. Why does the home staging playbook fail in a cat household?
5. What can a scent layer actually do at a showing?
6. What's the real timeline — and where does the 48-hour protocol start?
7. When the smell isn't a cleaning problem
8. What would FUROMA put in a staged home?

Introduction

FUROMA makes reed diffusers for homes with cats and dogs, and home staging with pets is the one odor scenario where the standard advice quietly breaks. Every staging guide says the same two things: eliminate the source, then deodorize lightly. Both are correct. Neither is usable, because they assume the seller can tell whether the source is gone — and the seller is the only person in the transaction who is physiologically unable to make that judgment about their own house.

This guide covers the part nobody writes down: how to get a measurement you can trust before a stranger walks in, why a cat household inverts the dog playbook, and why the work starts three weeks out. The final-48-hours protocol already exists in our guide to essential oils to get rid of dog smell; this page is the three weeks before it.

Why can't you smell your own house?

Because continuous exposure to an odor raises your detection threshold for that specific odor, and living in a house is continuous exposure. This is not a lapse of attention that can be corrected by concentrating harder. It is a measurable shift in the sensitivity of the system doing the measuring.

Pamela Dalton and Charles Wysocki ran the version of this experiment that matters to a home seller. Rather than puffing an odorant at laboratory subjects for a few minutes, they installed one of two odorants in participants' own homes and left it running for two weeks, then brought the participants into the lab and measured them against their own pre-exposure baselines. The result was odorant-specific: detection thresholds for the adapting odorant were elevated, and perceived intensity ratings for weak concentrations were reduced. The part that should worry a seller is the recovery curve. For most individuals, reduced sensitivity to the test odorant was still evident up to two weeks after the last exposure (Dalton & Wysocki, 1996). The authors specifically flag that this persistence is what distinguishes long-term adaptation from the short-exposure adaptation studied in most laboratory work.

A homeowner cannot audit the smell of their own house, because two weeks of continuous exposure to an odorant elevates the detection threshold for that odorant and most people are still measurably less sensitive to it two weeks after the exposure stops (Dalton & Wysocki, 1996). Stepping outside for five minutes and walking back in does not reset a two-week adaptation; it resets the few minutes of adaptation you accumulated standing in the hallway.

The mechanism runs at two levels at once. Dalton's review of the field describes olfactory adaptation as stimulus-specific loss of sensitivity that recovers over time in the absence of further exposure, with both peripheral components at the receptor and more central post-receptor components, and with the magnitude and time course of both adaptation and recovery depending on the concentration and the duration of the exposure (Dalton, 2000). Pellegrino and colleagues, reviewing the human literature, separate the two words that get used interchangeably: habituation is the decreased behavioral response produced by repeated exposure, adaptation is the neural process underlying it, and the onset of cortical adaptation is more pronounced than the peripheral kind (Pellegrino et al., 2017). Habituation, they note, is a filter: it exists so that a continuous background stimulus stops consuming attention, freeing it for new signals such as smoke.

That filter is exactly what a buyer does not have. Which is why the industry has a name for this and a saying about it. "'Nose blindness' is a very real thing," Kelly Dellinger of Akers Ellis Real Estate told NAR's staging blog in March 2026. "Sellers are frequently so accustomed to the odors associated with their pets, smoking habits or simply old carpets, they ignore or downplay them when it comes to prepping their homes for showings" (Dittmann Tracey, 2026).

The financial stakes are not hypothetical. In NAR's Animal House: Remodeling Impact survey, 67% of REALTORS® said animals have a moderate to major effect on selling a home, and roughly two-thirds said they advise animal-owning sellers to have the home cleaned to remove animal scents and to take the animals out of the house during an open house or showing (NAR, 2017).

How do you test an odor you can't smell?

You borrow noses that are not adapted, and you ask them in a way that does not lead the answer. This is not a folk remedy; it is a simplified version of how odor is measured professionally, and the professional version is instructive because of what it refuses to do — trust one person.

Odor professionals never trust a single nose, because a detection threshold is a population statistic rather than a personal one. Under EN 13725, the European standard for determining odour concentration by dynamic olfactometry, a sample is progressively diluted and presented to a screened human panel, and the odour concentration at the detection threshold is by definition 1 ouE/m³ — the answer is the dilution factor required to bring the panel to that threshold, not any one panelist's verdict. ASTM E679-19 does the same job with a different geometry: each presentation contains one spiked sample and two blanks, the panelist must choose one of the three even when guessing, and the series ascends until the choices stop being wrong. Both standards are built around the same admission — individual noses disagree, so you count them.

The household translation is four rules.

1. Use three people, not one. Three visitors who do not live in the house, asked separately, with no chance to hear each other's answers. One friend being polite is not data; three independent answers that agree are.
2. Ask a forced-choice question. "Does it smell?" invites reassurance. "Which room smells most like an animal lives here?" forces a ranking and produces a location. The person cannot decline to answer without telling you something.
3. Test the entry sequence, not the house. Have them walk in the front door, stand still for ten seconds, and answer before going further. That first breath is the only unadapted sample anyone will ever take of your home, and it is the exact sample a buyer takes.
4. Test before you open a window. Airing out a house lowers the concentration for about as long as the window is open. Testing a ventilated house measures the ventilation, not the house.

Then there are the tests that do not need a nose at all, which matter precisely because yours is compromised.

The closed-room test. Shut a room for six hours with the HVAC off, then have an unadapted visitor open it. Volatiles accumulate in still air, so a room that reads as neutral when it is ventilated will declare itself when it is not. An open house on a warm afternoon with the doors closed between groups is that test, run by strangers, with money attached.

The textile inventory. Odorants bind to porous material, so the honest way to predict a problem is to count porous objects rather than to sniff them: carpet and its underlay, upholstered furniture, curtains, mattresses, pet beds, and the two meters of drywall nearest a favorite sleeping spot. If a soft surface has been in contact with an animal for years and has never been deep-cleaned, treat it as a source regardless of what your nose reports.

The humidity test. Run the house warm and humid for an afternoon — a hot shower with the bathroom door open, no air conditioning — and then bring someone in. Warmth increases the release rate of volatiles from residue, and moisture reactivates the biology, which is covered in the cat section below. A house that only smells on a humid day still smells; you have simply been sampling it on the good days.

What is a buyer's nose doing at your open house?

Working perfectly, and pointed at exactly the signal you have stopped receiving. A buyer arrives with an unadapted olfactory system, spends ninety seconds in your entryway, and forms an impression before they have looked at the kitchen. Habituation is a change-detector (Pellegrino et al., 2017); everything about your house is a change to them and nothing about it is a change to you.

They are also, increasingly, primed to read fragrance as concealment. "Buyers today are hyper-sensitive to allergens," Greg Field of HomeSmart in Phoenix told the same NAR piece. "They want to smell nothing. If I walk in and my eyes start watering from fresh linen spray, I assume you are hiding a mold issue or deep-seated carpet stain." His description of the failure mode is the one worth memorizing: a wall of scented candles or plug-ins deployed against a pet smell "just smells like a lavender-scented litter box" in the end (Dittmann Tracey, 2026).

This is the same trap our dog-smell guide flags, and it is worth stating plainly here because staging is the scenario that most tempts people into it: over-deodorizing makes buyers more suspicious, not less. The seller reads a strong pleasant smell as "problem solved." The buyer reads it as "something is being covered," because a stranger's nose cannot separate the fragrance from what the fragrance is doing.

And a share of your visitors will react badly to the fragrance itself, independent of any suspicion. That is a real population, not an edge case, and we have written about the mechanism in our guide to scented candles and headaches in pet homes. A buyer who leaves your open house with a headache does not attribute it to your air freshener. They attribute it to your house.

Why does the home staging playbook fail in a cat household?

Because almost every step in it is, from the cat's point of view, a stressor — and the cat's response to that stressor is the exact odor you are trying to eliminate. The dog version of staging is a cleaning problem. The cat version is a cleaning problem plus a behavioral one that the cleaning can make worse.

Start with the chemistry, because it explains why cat urine behaves differently from anything else in the house.

Cat urine odor is self-renewing, because its most distinctive odorants are generated from a precursor rather than deposited as a finished smell. Miyazaki and colleagues showed that cauxin, a carboxylesterase excreted as a major protein in cat urine, hydrolyzes the felinine precursor 3-methylbutanol-cysteinylglycine into felinine, and they identified 3-mercapto-3-methyl-1-butanol together with three related sulfur compounds in the headspace gas above cat urine (Miyazaki et al., 2006). Headspace is the operative word: those compounds are already leaving the liquid and entering the room. Residue that is invisible is still a generator.

The second mechanism is bacterial and needs water. Mammals — cats and dogs alike — excrete nitrogen mainly as urea, not uric acid, and bacterial ureases hydrolyze urea to ammonia and carbon dioxide (Mobley & Hausinger, 1989). That reaction requires moisture, which is why a spot that has been dry and quiet for months becomes loud on the first humid week of the year, or the first time someone steam-cleans the carpet above it.

Ammonia is also the compound a resident is least equipped to judge, because its reported odor threshold ranges from 5 to 53 ppm across individuals (NRC, 2008) — a tenfold spread before adaptation is even considered. A concentration that reads as nothing to the person who lives there can read unmistakably as "cat" to the person who does not. They are not disagreeing about the house. They are two differently calibrated instruments, and only one of them is making the offer.

The behavioral half, which nobody stages for

Here is the finding that should change how a cat owner sequences a listing. The AAFP and ISFM house-soiling guidelines state that "introduction of another pet, person, or new furniture or other objects into this environment changes the collective odor to some degree and can stress some cats enough to induce urine marking behavior" (Carney et al., 2014).

An open house is therefore a documented urine-marking trigger, not a neutral event. A listing weekend delivers three of those changes at once: unfamiliar people walking through, staging furniture moved in, and the household's own objects rearranged or removed. The odor problem in a cat household frequently gets worse after staging begins, and the owner — adapted, busy, and looking at photographs rather than at the cat — is the last to find out.

The 2013 AAFP/ISFM environmental-needs guidelines sharpen the point. Their fifth pillar is the cat's sense of smell, and it advises against using products or substances — cleaners, detergents, scented litter and other cat paraphernalia — "that may disrupt the cat's sensory perception or the scent profile it associates with its customary surroundings," and recommends washing a cat's bedding on a rotation so that some items always retain the cat's own scent, which they call olfactory continuity (Ellis et al., 2013). A whole-house deep clean, performed in a weekend, is the precise opposite of that.

What to do instead

• Stage in stages. Deep-clean one room at a time over two to three weeks rather than the whole house in a weekend, and never wash all of the cat's bedding in the same cycle. Rotation preserves olfactory continuity while still getting everything cleaned before the listing photos.
• Add boxes, do not subtract them. The AAFP/ISFM guidance is that a single-cat household should have two litter boxes in two separate locations, and that the rule of thumb for multi-cat households is at least one more box than there are cats (Carney et al., 2014). Staging pressure pushes owners the other way — hide the box, consolidate to one, put it somewhere out of sight. That is how a clean house acquires a new stain on week two.
• Relocate early, not on the day. If a box has to move for showings, move it weeks ahead so the cat has accepted the new location before strangers arrive. A box relocated the morning of an open house is a box the cat may decline to use that afternoon.
• Scoop at least daily and wash the box itself. The same guidelines call for removing waste a minimum of once a day and washing the box every one to four weeks (Carney et al., 2014). During a listing, take that to the strict end of both ranges.
• Keep the cat out of the showing, not just out of sight. A cat shut in a bathroom with its box during an open house is still in the middle of the event. Roughly two-thirds of REALTORS® advise removing animals from the home during a showing (NAR, 2017), and for a cat the reason is behavioral as much as cosmetic.

If the fragrance side of a two-species household is what you are weighing, the biochemistry is in our guides to essential oils safe for cats and to using a diffuser around cats. Nothing in this section is a fragrance problem.

What can a scent layer actually do at a showing?

One thing, narrowly: once the source is gone, it makes an empty, freshly cleaned house read as inhabited rather than sanitized. That is the whole job. It is a real job — a house that smells of nothing but carpet shampoo reads as a house something was done to — but it is not odor removal, and a seller who buys it as odor removal has bought the wrong product.

Fragrance does not remove odor; it adds a second odor to the same air. If the source is still generating, the buyer receives both, and the combination is worse than either alone because it carries information: someone here is trying. That is the mechanism behind Field's "lavender-scented litter box." It is also why the order matters more than the product. Source removal, then verification by an unadapted nose, then — only then — a low-intensity scent layer.

Three practical constraints for the showing itself:

• Nothing that burns, in a house nobody is watching. An open house is an unstaffed building with strangers moving through it. A lit candle is a fire-risk object under those conditions before it is a fragrance decision, and combustion adds particulate to rooms that were just cleaned. Our dog-smell guide works through why passive diffusion suits staging and what the placement protocol looks like in the final 48 hours.
• One scent, not a defensive perimeter. NAR's own guidance is that competing fragrances irritate visitors and suggest masking. One source, low, in the entry area or the kitchen, is the entire deployment.
• Do not switch categories under pressure. If the source is not fixed by Friday, the answer is not a stronger product. Plug-ins and aerosol deodorizers are the reflex purchase at that moment; what they can and cannot do is in our guide to pet-safe air fresheners, and the method for reading the label on any of them is in how to read a pet-safe air freshener label. "Pet-safe" and "natural" are unregulated words on that shelf, including on ours.

What's the real timeline — and where does the 48-hour protocol start?

Three weeks, not two days — and the two days are the last step, not the plan. The reason is the recovery curve from the first section: if you want your own nose back as a check on your own work, the clock on that is measured in weeks, not in a walk around the block (Dalton & Wysocki, 1996). Everything below happens before the 48-hour countdown in our dog-smell guide, which handles the final sequence and the day-of placement.

If the listing is already live and Day −21 was two weeks ago, the compression order is: panel first, textile inventory second, everything else after. The measurement is the step that changes what you spend money on, so it is the step that cannot be cut.

When the smell isn't a cleaning problem

Two categories of odor will not respond to any amount of staging, and both are worth identifying early because the correct action is not a product.

The animal. Some odors come from the animal rather than from the house, and several of them are clinical signs rather than hygiene gaps. Our dog-smell guide has a section on the smells that warrant a veterinary appointment rather than a deep clean — the short version is that a smell that has a source you can point to on the animal is a veterinary question, and no amount of carpet cleaning changes it. If you suspect that is what you are dealing with, read when a dog smell is a medical signal before you book the carpets.

The building. If odor returns within days of a competent deep clean, or returns predictably with humidity, the residue is likely below the surface being cleaned — underlay, subfloor, the base of a wall — or the cause is not the animal at all. That is an inspection, not a fragrance decision, and it is the exact scenario Field describes buyers assuming when they walk into a wall of scent. Getting it inspected and disclosed is cheaper than getting it discovered.

FUROMA does not sell a solution to either of these. Saying so is not modesty; it is the only version of this advice that survives contact with a buyer's nose.

What would FUROMA put in a staged home?

Reed diffusers, one per major room, placed after the source is gone and after an unadapted panel has confirmed it. The reason is structural rather than aromatic: a reed diffuser has no flame and no power cord, so it can be left in an unstaffed open house; it releases vapor passively at room temperature, so it deposits nothing on surfaces a stager has just finished; and its output is self-limiting, which makes it hard to accidentally cross the line into the intensity that reads as concealment.

If you want the full five-property framework for choosing a reed diffuser for a pet household — formulation, chemotype, carrier, reed material and bottle design — that is in our pet-safe reed diffuser buying guide, which is the page to read before you buy rather than before you list.

Two things we will not claim. FUROMA has no named veterinary reviewer, so nothing here is vet-endorsed, and we do not describe our blends as treatments for anything. And a reed diffuser does not remove pet odor — it is the last 5% of a staging plan whose first 95% is source removal. The botanical names and chemotype designations behind these blends are published on our Pet Safe Philosophy page, which is the only place on furoma.online where that level of detail appears; the product pages carry the marketing callout, not the full profile.

Key Takeaways

• You are the least qualified person to judge your own house. Two weeks of continuous in-home exposure elevates the detection threshold for that odorant, and most people are still less sensitive to it two weeks after the exposure ends (Dalton & Wysocki, 1996).
• Borrow three noses, not one. Odor standards from EN 13725 to ASTM E679 are built on panels and forced choice precisely because single noses disagree. Ask three non-residents separately, at the front door, before opening a window.
• The money is real. 67% of REALTORS® say animals have a moderate to major effect on selling a home, and about two-thirds advise sellers to clean out animal scents and remove the animals for showings (NAR, 2017).
• Cats invert the playbook. An open house is a documented urine-marking trigger — new people and new objects change the household's collective odor enough to stress some cats into marking (Carney et al., 2014) — so a cat household should add litter boxes and stage gradually, not consolidate and blitz.
• Cat urine keeps generating. Cauxin-derived felinine yields 3-mercapto-3-methyl-1-butanol and related sulfur compounds in the headspace above cat urine (Miyazaki et al., 2006), and bacterial urease turns urea into ammonia whenever moisture returns (Mobley & Hausinger, 1989). Residue is a source, not a stain.
• Start three weeks out. Panel, textile inventory, staged deep clean, re-panel, humidity test — then hand off to the 48-hour countdown, which is a different document and a different job.
• Fragrance is the last 5%. It adds a second odor to the same air; it does not subtract the first. Deployed over an unfixed source, it reads to a buyer as concealment, which is worse than the smell.

Frequently Asked Questions

How do I know if my house smells like dog?

You cannot find out by smelling it yourself. Ask three people who do not live there, separately, at the front door, before anyone opens a window, and ask which room smells most like an animal lives there rather than whether it smells. Three independent answers that agree is a measurement. Your own impression is not, because continuous exposure has raised your threshold for exactly that odor.

Why can't I smell my own house?

Because of olfactory adaptation. Continuous exposure to an odor produces a stimulus-specific loss of sensitivity to it, at both the receptor and the cortical level, and the loss recovers only slowly once exposure stops (Dalton, 2000). Dalton and Wysocki (1996) found that after two weeks of exposure inside people's own homes, most were still measurably less sensitive two weeks later. It is a filter, not a failure of attention.

How long before a showing should I start removing pet odor?

About three weeks, not two days. You need time to test with unadapted visitors, find sources by inventory rather than by nose, deep-clean room by room, then re-test with a second set of people before you commit to a scent layer. The final 48 hours is execution. If the listing is already live, do the visitor panel first, because it changes what you spend money on.

Should I use air fresheners or candles before an open house?

Not as a fix, and not in quantity. Buyers read strong fragrance as concealment, and NAR's staging guidance warns that competing scents irritate visitors and suggest masking. A lit candle is also a fire-risk object in an unstaffed open house. If the source is genuinely gone, one low-intensity passive source in the entry or kitchen is the whole deployment.

Where should I put the litter box when my house is for sale?

Somewhere the cat has already accepted, moved weeks in advance rather than on the morning of a showing. AAFP and ISFM guidance is two boxes in two separate locations for a single cat, and at least one more box than cats in a multi-cat home (Carney et al., 2014). Staging pressure pushes owners to consolidate and hide boxes, which is how a clean house acquires a new stain.

Do I have to take my pets out during a showing?

Roughly two-thirds of REALTORS report advising exactly that, alongside cleaning the home to remove animal scents (NAR, 2017). For cats there is a second reason: new people and rearranged objects change the household's collective odor enough to stress some cats into urine marking (Carney et al., 2014). Shutting a cat in a bathroom leaves it inside the event rather than outside it.

Does staging actually change what a house sells for?

In NAR's 2025 Profile of Home Staging, 29% of agents reported staging produced a 1% to 10% increase in the dollar value buyers offered, 30% saw a slight decrease in time on market and 19% saw a significant one. That survey is about staging generally, not odor specifically. The pet-specific figure is separate: 67% of REALTORS say animals have a moderate to major effect on selling a home.

Why does the smell come back on humid days?

Because the residue never left, the conditions changed. Warmth raises the release rate of volatiles from material that still holds residue, and bacterial urease needs water to hydrolyze urea into ammonia (Mobley and Hausinger, 1989), so a dry, quiet spot becomes active again when the material takes up moisture. Test your house warm and unventilated, not on a breezy afternoon with the windows open.

Is a reed diffuser a good choice for a home that is on the market?

It is the format that fits the constraints: no flame and no power cord in an unstaffed open house, passive vapor that deposits nothing on freshly cleaned surfaces, and a self-limiting output that is hard to push into the intensity buyers read as concealment. It is not odor removal. Place it after the source is gone and after someone who does not live there has confirmed it.

Related Reading

• Ready for the final 48 hours — deep clean, bedding, crates, placement, day-of? The countdown protocol and the oils behind it are in our guide to essential oils to get rid of dog smell, which is the page this one hands off to.
• Buying the diffuser rather than staging with one you own? The five structural properties — formulation, chemotype, carrier, reed material and bottle design — are worked through in our pet-safe reed diffuser buying guide.
• Tempted by an aerosol or plug-in the week before a showing? What that category can and cannot do is in pet-safe air fresheners, and the method for reading any of those labels — including ours — is in how to read a pet-safe air freshener label.
• Worried a visitor will react to the scent itself rather than to the house? Our guide to scented candles and headaches in pet homes covers who reacts, and why a gentle format is not a cure for it.
• Staging a two-species household? Start with essential oils safe for cats and using a diffuser around cats, and read why chemotype changes the answer before you trust a plant name on a label.

Author & References

FUROMA Research Team. FUROMA is a California home-fragrance brand making reed diffusers and passive essential-oil diffusers for households with cats and dogs. We do not claim veterinary endorsement and we have no named veterinary reviewer. This article is informational and is not a substitute for veterinary, real-estate or legal advice. Every factual statement is sourced to a public, checkable reference so that you can check it against us. Our botanical names, species and chemotype designations are published on our Pet Safe Philosophy page. If you suspect a pet has been exposed to a toxic substance, call your veterinarian or the ASPCA Animal Poison Control Center at (888) 426-4435 immediately.

1. Dalton, P. & Wysocki, C. J. (1996). The nature and duration of adaptation following long-term odor exposure. Perception & Psychophysics 58(5): 781–792. DOI: 10.3758/BF03213109. PMID: 8710455.
2. Dalton, P. (2000). Psychophysical and behavioral characteristics of olfactory adaptation. Chemical Senses 25(4): 487–492. DOI: 10.1093/chemse/25.4.487
3. Pellegrino, R., Sinding, C., de Wijk, R. A. & Hummel, T. (2017). Habituation and adaptation to odors in humans. Physiology & Behavior 177: 13–19. DOI: 10.1016/j.physbeh.2017.04.006
4. National Association of REALTORS® (February 13, 2017). Animal House: Remodeling Impact — press release "When Home Buying, Selling and Renovating, it's an Animal House, Say Realtors®". 67% of REALTORS® report a moderate to major effect of animals on selling a home; approximately two-thirds advise animal-owning sellers to replace animal-damaged items, clean the home to remove animal scents, and remove animals during an open house or showing. nar.realtor. Retrieved July 22, 2026.
5. National Association of REALTORS® (May 6, 2025). 2025 Profile of Home Staging. 29% of agents reported a 1–10% increase in dollar value offered; 30% slight and 19% significant decreases in time on market. Methodology: February 2025, 49,806 active REALTORS® invited, 1,266 usable responses, 2.5% response rate, margin of error ±2.75% at the 95% confidence level. nar.realtor. Retrieved July 22, 2026.
6. Dittmann Tracey, M. (March 23, 2026). Your Home Listing Stinks! Here's What to Do About It. Styled, Staged & Sold, National Association of REALTORS®. Quotations from Kelly Dellinger (Akers Ellis Real Estate, Mt. Pleasant, S.C.), Greg Field (HomeSmart, Phoenix) and Kimberly Schmidt (Compass, San Diego). nar.realtor. Retrieved July 22, 2026.
7. European Committee for Standardization. EN 13725:2022 — Stationary source emissions: determination of odour concentration by dynamic olfactometry and odour emission rate. The odour concentration at the detection threshold is by definition 1 ou_E/m³.
8. ASTM International. ASTM E679-19 — Standard Practice for Determination of Odor and Taste Thresholds by a Forced-Choice Ascending Concentration Series Method of Limits. Three-alternative forced choice; one spiked sample and two blanks per presentation.
9. Miyazaki, M., Yamashita, T., Suzuki, Y., Saito, Y., Soeta, S., Taira, H. & Suzuki, A. (2006). A major urinary protein of the domestic cat regulates the production of felinine, a putative pheromone precursor. Chemistry & Biology 13(10): 1071–1079. DOI: 10.1016/j.chembiol.2006.08.013. PMID: 17052611.
10. Carney, H. C., Sadek, T. P., Curtis, T. M., Halls, V., Heath, S., Hutchison, P., Mundschenk, K. & Westropp, J. L. (2014). AAFP and ISFM Guidelines for Diagnosing and Solving House-Soiling Behavior in Cats. Journal of Feline Medicine and Surgery 16(7): 579–598. DOI: 10.1177/1098612X14539092
11. Ellis, S. L. H., Rodan, I., Carney, H. C., Heath, S., Rochlitz, I., Shearburn, L. D., Sundahl, E. & Westropp, J. L. (2013). AAFP and ISFM Feline Environmental Needs Guidelines. Journal of Feline Medicine and Surgery 15(3): 219–230. DOI: 10.1177/1098612X13477537
12. Mobley, H. L. T. & Hausinger, R. P. (1989). Microbial ureases: significance, regulation, and molecular characterization. Microbiological Reviews 53(1): 85–108. DOI: 10.1128/mr.53.1.85-108.1989. PMID: 2651866.
13. National Research Council (2008). Emergency and Continuous Exposure Guidance Levels for Selected Submarine Contaminants, Volume 2. Washington, DC: National Academies Press. Ammonia odor threshold reported to range from 5 to 53 ppm; sensory fatigue (adaptation) documented.
14. FUROMA. Products feed, furoma.online/products.json — prices, volumes and scent callouts as of July 22, 2026.
15. FUROMA. Pet Safe Philosophy. furoma.online/pages/pet-safe-philosophy. Retrieved July 22, 2026.

Method note: product prices, volumes and scent callouts describe furoma.online as it stood on July 22, 2026. Product pages change. The NAR figures are survey estimates from samples of REALTORS®, not measurements of any individual sale, and the timeline in this article is a planning framework rather than a guarantee about any particular house.