Older cats have a varied outlook for longevity and illness.
Cosmos is in pretty good shape for 20 years old! An attentive and dedicated owner is key. Older cats need attention focused on their eating interest and ability. Kidney disease or even poor dental health can impair appetite. On the other end, dry food and poor water intake, as well as kidney disease decreases bowel movements and leads to serious constipation.
Veterinarians are in the unique position to pick up on these signs early.