Once you've ruled out possible medical conditions as the cause, turn your attention to the litter box itself, since this is most often the culprit. (bestfriends.org)
Veterinarians must rely on a senior pet exam that includes performing blood and urine tests and taking a detailed behavioral history to rule out other possible medical conditions. (prevention.com)
Insurance companies like to thoroughly review applications for possible medical conditions that could allow them to rate you at a higher class, so this might be out of your budget unless you are in exceptional health and a nonsmoker. (insurechance.com)