Old Cat Syndrome. Cats are generally considered seniors at around 8 to 10 years of age. This condition is most often seen in cats which are.

Aging cats sometimes experience behavior changes such as forgetting where you put their litter box, being less active, and being more aggressive.if your older cat starts acting differently, it. It is often associated with decreased muscle tone, shorter height, and upward slanting eyes. Also known as xxy syndrome, klinefelter syndrome (ks) is a sex chromosome condition that occurs when a male kitten is born with an extra x chromosome.