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Dr. Welton
Dr. Welton, Cat Veterinarian
Category: Cat
Satisfied Customers: 1451
Experience:  Licensed small animal veterinarian since 2002. Practice owner since 2004.
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my cat,9yrs old,has always been very friendly with all dogs,even

Customer Question

my cat,9yrs old,has always been very friendly with all dogs,even playing ball together.the past few months he has become unfriendly and attacking my neighbours dog for no reason.he wont let any dog in the house and if he can he will jump on an unaware sleeping dog
Submitted: 3 years ago.
Category: Cat
Expert:  Dr. Welton replied 3 years ago.

Dr. Welton :

Hello. My Name isXXXXX and I would be happy to help. It is often a bit of a task to determine why sudden behavioral changes occur in cats, but it happens more commonly than many feline owners realize. At 9 years old, there are underlying health conditions that have the potential to change a cat's behavior. The most notable of these is hyperthyroidism, a disease where the thyroid becomes abnormal and over-secretes thyroid hormone. Among many other health consequences, hyperthyroidism is know to make cats ornery in some cases.

Dr. Welton :

Other diseases that are known to make otherwise normal kitties grumpy are kidney disease and urinary tract disease. Thus, before making the assumption that this is a behavioral issue, I would schedule an appointment for Jim to have a through examination, blood work, and urinalysis, a small investment of time and money that will either rule out or rule in a medical cause for the odd behavior.

Dr. Welton :

Once a medical cause is ruled out, you can then focus on the behavioral side of it. His territorial behavior directed at the neighborhood dogs may be triggered by the scent of another cat moving into his territory.

Dr. Welton :

Thus, I would try pheromone therapy that may counteract the hostile scent of that presumed other cat that has him is such a territorial and aggressive state.

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