answer:You should not assume it is just old age. That is not the likely cause. It could be a urinary tract infection or any one of several other conditions. In any case, the symptom of the urine leak can cause urine burning of the skin and be painful for her. You need to get her to the vet for a full check and remember to tell the vet how long it has been going on, and where and when you notice the leakage. Good luck and let us hear how Katie is,