But not all tumors are life-threatening. Many older animals develop benign skin tumors, which veterinarians can easily remove. As with all medical conditions, however, early detection and treatment of tumors offers the best hope for a favorable outcome. Even the most prim and proper pet may start urinating in the house as it ages. But a number of other diseases, such as diabetes, can cause increased thirst and urination.
Inappropriate elimination can also stem from a cognitive problem.
Your pet simply may not realize what it's doing. Instead, check with your veterinarian. Older dogs may not respond as quickly to commands as the once did. This slowdown may be due to the pain and stiffness of arthritis. Another possible explanation for slower responses is the general slowdown of information processing in the brain.