This is our old lady cat, Violette. For months now we have been having trouble with her refusing /forgetting to use the litter box. (We now have four boxes.) We took her to the vet and after all the blood tests and exams, they determined that she was a healthy old cat, especially since she is 16 years old. Five oriental rugs have been ruined, hardwood is smelly and I am getting ready to have wall to wall carpet torn out in a bedroom. I now have a complete arsenal of cleaning supplies and anti-cat urine products. I finally had reached my breaking point and made an appointment to have her put down this week. The vet had told me that even though there is no physical reason for her habits, if she can no longer fit into our lives, then we could have her "put down." I made the appointment, but my husband and I were so upset that morning, that I cancelled it. I continue with the numerous puppy training pads all over the house, cleaning up constantly and now trying to limit her territory. And no, nothing has changed in the house over the last four or more months to cause this. I researched it online and have made my own diagnosis (with no help from the vet, thank you) that she is suffering from senility. Yes, cats can have this when they are old.
We are trying to be patient with Violette and give her love and attention since, of course, she is not doing this on purpose. I remember when Beau was a puppy and all the accidents he had. The difference is that we knew he would learn to go outside. Violette is just old. Wish me luck.