My cats are drooling but seem fine. Could my new air freshener be why?

There are some contagious viruses such as calicivirus that can cause ulcers in the mouth along with other upper respiratory signs such as sneezing and nasal discharge. It is also possible that both cats were exposed to a toxin or something caustic that injured their mouths if they go outdoors or have access to any chemicals. If their symptoms have been present for more than 24 hours I'd recommend taking them to an emergency veterinarian. They can examine both cat's mouths to look for problems and determine whether or not they may be dehydrated from not eating or drinking.

If it happened suddenly it is due to something he licked or ingested, cats are very sensitive to bad taste and start drooling easily. it could be something toxic as well, if within 20 minutes you do not see any improvement or if your cat becomes lethargic- take him to the ER right away.

If all four are experiencing the same symptoms, I would be suspicious that they have eaten something toxic that has upset their stomach (drooling is a sign of nausea), and the voice change could be due to vomiting that you may have not seen. Cats like to chew on plants, and oftentimes, there are plants around the house and yard that are toxic to cats, but the owners do not know they are toxic. They also could have eaten an insect or some rotten food that is causing their symptoms. Given that all four are showing these symptoms, I would check any plants in the house and yard (if they are allowed outside) for toxic plants, and remove them. Given they are still eating, I would monitor them for now, and if the drooling and voice changes continue over the next 24-48 hours, I would take them all into the vet for an exam.

The drooling can be a sign of nausea in cats, but given that Rex hasn't had a change in activity, appetite, or anything else, I would keep an eye on him for now. It could be chewing on those plants has upset his stomach, and I would keep them out of reach. Try feeding him a bland diet of boiled white meat chicken (no bones) in small amounts several times a day for a couple of days. Then slowly add back in his normal diet. If he's still drooling in another 24 hours after being on this diet or anything else changes from the normal, then I would have him seen by a vet.

He could have an upper respiratory infection, dental problem, or other medical issue. It is impossible to know the cause without doing an examination. If he has an upper respiratory infection, it could be contagious to the other outside cats. Make sure you wash your hands and change clothing after handling him before touching your indoor cats. If possible, catch him and take him to a vet for an examine and treatment.

A number of essential oils are toxic to cats, so that could be the cause of Oli's drooling. It could also be he has a dental problem. Should this drooling start up again, have him seen by a vet. Best of luck.

Yes, it coukd be that. You need to be very careful with essential oils and cats. I suggest you stop using it and see what happens. If the drooling continues it could be a dental problem in which case she should see a vet.