By Jean Hofve, DVM Just like humans, cats are prone to a number of medical problems as they get older. With diet, supplements, and extra care, many of these conditions can be prevented, delayed, or managed, to give your cat a good quality of life in her older years. Arthritis A study found that 90% of cats over 12 years had radiographic (x-ray) evidence of degenerative joint disease (DJD or arthritis). This came as somewhat of a surprise to the veterinary community, since few cats are ever clinically diagnosed with ...