Jake was acting like that. It happened so gradually that I just thought it was a personality thing. I thought he didn't like us at all and that he would be happier somewhere else. I even seriously considered sending him to live with my stepdaughter because I thought he'd like her better!

You know what it was? He was in pain. He wasn't showing any other symptoms of it, but he has arthritis. When we started giving him rimadyl, he became his lovely old self again.

Maybe your old guy has pain, as well. If I had known what I know now, I would have taken Jake to the vet for an examination sooner.