Old age in cats, as in humans, occurs in different ages. Under good nutrition and veterinary care eighteen-, nineteen – and twenty-cats is by no means rare. But the cat turned 24.
Changes in behavior are usually reduced to a decrease in activity (they hunt less) and a constant desire to relax and sleep. Some nervous cats with age, become uncommunicative, as I try to avoid stress; some may become irritable.
If they suffer from a combination of some disease than a single disease, as it was with them in his youth. They are less likely to suffer from arthritis than dogs, but often suffer from kidney disease.