Cats are masters at hiding pain and suffering. You may think your cat is perfectly healthy, but she could have a major illness that is undetected. You can be your cat's health care advocate by seeking routine care and watching for these subtle signs of disease. If your cat exhibits any of these behaviors, seek veterinary advice. Many diseases can be easily treated or managed if caught early. See our age/disease chart to determine your cat's health risks based on his or her age.