Pheromones for fighting cats – do they work?

Pheromones are primarily volatile organic chemicals used by animals for communication. The word 'pheromones' was created in 1959 by Karlson, Luscher, and Butenand, combining the Greek verbs pherein (to carry) and horman (to stimulate). They are crucial in triggering species-specific responses and influencing behavior. Different species do not respond to each other's pheromones, and unlike hormones, pheromones act externally rather than internally. They are secreted into the environment by exocrine glands. 

Among all mammals, carnivores are believed to have the most complex and developed system of pheromone-excreting glands (Pageat & Gaultier, 2003). In cats, 7 pheromones have been identified, but we only know the function of 5 (Barrios et al., 2025). 

F1 – unknown

F2 – sexual facial marking in male cats

F3 – facial marking on items, antagonist of urine marking and scratching

F4 – allomarking, antagonist of territorial or irritative aggression

F5 – unknown

This is from data from: Brown, Richard E, and David W Macdonald. Social Odours in Mammals. Oxford: Clarendon Press; New York: Oxford University Press, 1985. Print.

Some species use their main olfactory system to detect pheromones, others, like cats, mainly use their vomeronasal organ (VNO) to detect pheromones (Wyatt, 2014). 

Pheromones are not just odors entering the feline airways through the nostrils. Instead, they enter the feline body via the VNO, a cavity in the upper jaw connected to the brain. The typical behavior cat owners notice is their cat's open-mouth breathing when it encounters pheromones from an unknown conspecific or when their feline friend returns from the veterinarian. 

Commercially available pheromones.

Of the known feline pheromones, some are heavily marketed as synthetic versions. Cats are known to release F 3 during a facial rubbing, and it is marketed as a tool to promote calmness. 

Cats are known to be solitary creatures and highly sensitive to stress induced during vet visits, change of environment, or when cat owners decide to bring a new friend into the resident cat’s home. 

Using a pheromone diffuser to prevent stress-related behaviors like scratching furniture or aggression is an easy solution for many cat owners, even though it is not inexpensive. From my experience talking to clients, at least 80-90% of all cat owners have used a pheromone diffuser at some point or have been advised to use one by their veterinarian. 

Anecdotally, many of my clients say that the diffuser didn't impact their cat's behavior, or even made things worse in some cases. 

I totally understand why someone might choose to buy an expensive diffuser filled with a mysterious liquid to plug into the wall, promising that your cat's stress will ease within days—or that the cat will calm down, stop marking, scratching the couch, or chasing and attacking the new feline friend you brought home from the shelter. 

Having tension between cats or a stressed-out cat at home can be very difficult. It’s understandable that no one wants to deal with cleaning up urine daily, hearing growling and hissing, or watching new furniture get scratched. These problems don’t create a peaceful and relaxing home environment. 

The idea of a plug-in diffuser or other quick-fix drops can seem really tempting when you're in a tough spot, looking for an easy solution. 

But do synthetic pheromones really work, and how do they work? 

The answer is not that simple. Here are some recent studies, along with brief summaries of their results. 

1.     In this 2024 thesis (Svensson, n.d.), the effects of synthetic pheromones on the stereotypic behaviors of four big cats (3 lions and 1 tiger) were studied. This is an experimental study in a zoo setting; all four subjects received all treatments in a crossover design. During relocation from their old to a new enclosure, measurements were taken, and behaviors were observed. The results showed no significant difference in the stereotypic behaviors when transitioning between the old and new enclosures during the pheromone treatment phase. 

2.     In this peer-reviewed study (Torres-Bernal et al., n.d.), three pharmacological interventions were evaluated to reduce fear-induced changes in cats exposed to a dog eliciting fear behavior. The interventions tested included cannabidiol, gabapentin, and synthetic pheromones. The authors measured body temperature using infrared, as well as heart rate, respiratory rate, and rectal temperature. They did not assess behavioral topography. The findings indicate that all three interventions reduce impact body temperature in fearful cats, with CBD and GABA showing the greatest effectiveness. 

3.     In this experimental design (Chasles et al., 2026), two groups of 11 cats were exposed to an unfamiliar human in a room sprayed with water or F3 facial pheromones. The cats’ behaviors were observed and coded during the 40-minute interaction. Behaviors included moving into the area where the unfamiliar human sat, approaching the unfamiliar human, rubbing, feeding, and sitting. Latency, duration, and frequency were measured. Data showed no statistically significant effects on human-directed behaviors, and a significant difference between the two groups was observed only for rubbing behavior. Rubbing was defined as the cat rubbing any part of its body against an object. 

4.     This 2026 study is still in peer review (Cozzi et al., 2026). The setup is similar to the Chasles study (3) but features an improved experimental design. The behavior of 14 cats was assessed during exposure to a room containing either an F3 diffuser or a water diffuser. Behavioral parameters were recorded during a 10-minute exposure period. The statistical analysis revealed that cats in the room with the F3 diffuser spent more time near the diffuser, either lying down, playing, or rubbing against objects. There were no differences in other behaviors, such as meowing or sitting. These results indicate that F3 increases behaviors indicative of a cat’s relaxation and curiosity about its environment. 

The last three studies show that synthetic pheromones affect individual cat behavior. More rubbing behavior is observed in all studies. This is to be expected, knowing that the F3 fraction impacts facial marking on items (Wyatt, 2014). 

However, from a scientific standpoint, this does not mean that F3 synthetic pheromones have any positive effect on cat-to-cat interactions. Rubbing on subjects does not necessarily prevent a cat from staring, stalking, or chasing an unfamiliar cat within its territory. And this is what a cat introduction involves: desensitization and counterconditioning to an unfamiliar stimulus. 

From a regulatory perspective, I think it's questionable to claim a pheromone product can solve inter-cat aggression and to market these products as the sole solution for households dealing with severe inter-cat aggression. 

Key Takeaways when it comes to pheromones for cats:

• Research shows mixed results.

• Many studies are funded by the manufacturer. 

• Many studies lack a well-controlled control group. 

• Findings are generalized too generously:

• Example: if a study shows that a product increases rubbing behavior, this does not mean fighting cats will fight less and rub more on furniture. 

Many veterinarians recommend diffusers because they are low-risk ("can't hurt, might help") and give owners a sense of control. However, it is important to recognize that they should only be one tool in the toolbox while the actual heavy lifting of desensitization and counterconditioning takes place. 

References: 

Barrios, F., Ruiz, P., & Damián, J. P. (2025). Tools for the Approach of Fear, Anxiety, and Stress in the Domestic Feline: An Update. Veterinary Medicine International, 2025(1), 9109397. https://doi.org/10.1155/vmi/9109397

Chasles, M., Demellier, J., Monneret, P., Teruel, E., Descout, E., Pageat, P., Cozzi, A., & Marcet-Rius, M. (2026). Can a water-based mist form of the F3 facial pheromone have a short-term effect on cats’ adaptation to a new situation? Journal of Feline Medicine and Surgery, 28(3), 1098612X261417803. https://doi.org/10.1177/1098612X261417803

Cozzi, A., Marcet Rius, M., Teruel, E., Monneret, P., Menuge, F., Asproni, P., & Pageat, P. (2026). EXPRESS: Enhanced environmental acclimation of cats using an innovative passive diffuser of the Facial-Marking Pheromone (F3). Journal of Feline Medicine and Surgery, 1098612X261422953. https://doi.org/10.1177/1098612X261422953

Crump, E. (2023). Effectiveness of F3 feline facial pheromone analogue for acute stress reduction within clinical veterinary practice. Veterinary Evidence, 8(4). https://doi.org/10.18849/ve.v8i4.669

De Jaeger, X., Meppiel, L., Endersby, S., & Sparkes, A. H. (2021). An Initial Open-Label Study of a Novel Pheromone Complex for Use in Cats. Open Journal of Veterinary Medicine, 11(03), 105–116. https://doi.org/10.4236/ojvm.2020.113006

Frank, D., Beauchamp, G., & Palestrini, C. (2010). Systematic review of the use of pheromones for treatment of undesirable behavior in cats and dogs. Journal of the American Veterinary Medical Association, 236(12), 1308–1316. https://doi.org/10.2460/javma.236.12.1308

McGlone, J. J., Garcia, A., Thompson, W. G., & Pirner, G. M. (2019). Maternal-Neonatal Pheromone/Interomone Added to Cat Litter Improves Litter Box Use and Reduces Aggression in Pair-Housed Cats. Journal of Applied Animal Welfare Science, 22(2), 127–138. https://doi.org/10.1080/10888705.2018.1446341

Pageat, P., & Gaultier, E. (2003). Current research in canine and feline pheromones. Veterinary Clinics of North America: Small Animal Practice, 33(2), 187–211. https://doi.org/10.1016/S0195-5616(02)00128-6

Seksel, K., & Behav, A. (n.d.). PHEROMONES – WHAT ARE THEY AND HOW TO USE THEM EFFECTIVELY.

Svensson, V. (n.d.). The effect of a putative pheromone on the behavior of rescued big cats in a sanctuary, before and after a transition into a new enclosure.

Torres-Bernal, F., Martínez-Burnes, J., Hernández-Avalos, I., Olmos-Hernández, A., Domínguez-OIiva, A., Reyes-Sotelo, B., González-López, C., Villanueva-Pereyra, D., & Mota-Rojas, D. (n.d.). Infrared Thermography and Physiological Variables as Methods for Recognizing Fear in Domestic Cats (Felis catus) Using Three Pharmacological Models: Cannabidiol, Gabapentin, and Synthetic Facial Pheromones.

Wyatt, T. D. (2014). Pheromones and Animal Behavior: Chemical Signals and Signatures (2nd ed.). Cambridge University Press. https://doi.org/10.1017/CBO9781139030748