First off let me say that I'm sorry to hear that about your cat. I have one myself and like every other animal they just become one of the family. I had originally thought that maybe you could have him declawed but due to his age a vet may be reluctant to do that and it would probably just stress your cat out even more. My only other suggestion (and I'm sure you've thought of this) is to call your vet and ask. There may be a medication out there that can help. Hope things work out for you!