I think the problem could be the litter itself. What kind do you use? Have you tried changing? I've also heard from someone that said her vet told her to stay away from the clumping kind. It clumps when it gets wet, right? Then what happens when kitt...

I think they are letting the new cats know what's theirs. "This is mine, you stay away." I think it's like a dog, they are "marking" their territory. There are products out there to help, check with your local pet store. My adult male cat started spr...

How long have you had the new cat? You do realize that it takes 2 weeks or more for a cat to adjust to their new surroundings, right? I had a cat that I got as a full grown adult and we did not even see him for the first two weeks. He hid under furn...