My cat is aggressive towards my dog. What would the vet check?

Something is probably going on with her, she is possibly ill or in pain and that may be causing her to be aggressive. i would recommend taking her to the vet for a checkup and blood test to make sure she is in good health first.

Oh my, that is strange that Stan has suddenly become aggressive! A sudden change in behavior from the normal can signal a medial problem. Cats who are sick or are in pain can become aggressive to other animals and their humans. I would have Stan seen by a vet today or first thing tomorrow. The vet can give him a physical exam, blood tests, a urinalysis, and possibly other tests such as an x-ray to diagnose if there is a medical illness causing his aggression. If one is found, the vet can discuss treatment with you. If one is ruled out, I will give you a method to help them get along again. I would separate the cats, and slowly reintroduce them to each other. Take Stan, and put his in his own room with his own food, water, and litter box. Keep the door closed, and for a few days, feed them both treats on other side of door so they associate each other's smell with a good experience. Then let the other cat into Stan's room while he is in a cat carrier. They can smell each other, but not be in contact. If either becomes upset or show signs of aggression, remove the second cat from the room, and try again later. Praise them when they interact appropriately. When they are interacting well with each other through the carrier, you can let Stan out of his room, and see how he interacts with the other cat. Praise them when they interact appropriately, and separate them with any sign of aggression or upset. I would get a cat tree with lots of shelves to give the cats vertical space to get away from each other. I would keep Stan in his room when you go out until they are comfortable with each other.

It would be hard to give a specific answer without more information. If your cat is being aggressive toward other cats, separating them and making sure each cat has access to their own food, water, litter, etc can help reduce tension. If your cat is being aggressive toward you, a good first step is a trip to the vet as pain or illness can sometimes cause behavioral changes in cats. If Chester checks out healthy, speaking with a veterinary behaviorist may be helpful in figuring out what is going on, and working on a combination training/medication plan to help reduce the behavior. https://www.dacvb.org/page/about

Sorry you are having some troubles with Monster! I recommend that you take him to your vet for a senior blood panel. They can check his thyroid as well. Hyperthyroidism (an overactive thyroid gland) is not uncommon in older cats and can lead to behavioral changes, more vocalization, eating more, acting odd. Get him in for bloodwork when you can! Thanks for asking Petco Pet Education Center, formerly Petcoach!

Okie is gorgeous! Having a physical exam and screening bloodwork and a fecal exam and urinalysis to rule out a medical cause for his crankiness such as an ear infection, diabetes, kidney/liver issues, hyperthyroidism etc. would he best. Using a Feliway mulicat calming pheromone plug -in several rooms in your home along with daily VetriScience Composure chews or oral liquid may help significantly with stress related aggression /inappetance. Both of these products are available without a prescription on chewy.com and PetCo.com. Good luck!

There could be a reason for Aspyn's change in behavior. Sometimes a sudden change behavior can be a sign of a medical illness. I think it would be a good idea to have her seen by a vet for a health check.

Thank you for submitting your question regarding Lily. I would start by having her see her veterinarian. She will need a thorough examination and laboratory work. Most cases of behavior changes are due to an underlying medical condition. Pain somewhere in her body could be causing her to act out aggressively. A neurological condition is less likely. If a medical problem is not identified, then anxiety should be considered. Medication options can be discussed if this is thought to be the case. I hope this information helps!