You are right , when you say , that Cats relax , as they get older. Plus the fact is , they gradually realize that the other Cat is not going to hurt him, and can be an useful ally. Found cats MMMMMMMMMMMMMMMEEEEEEEEEEEEEEEEEOOOOOOOOOOOOOOOOOW WWWWWWWWWWWWWWWWWWWfor Peanuts and Tubby!!!!!!