Deuce has started biting at his butt a lot lately. He can't reach and ends up chewing right near his tail though. It is causing some irritation to his skin. Could this be b/c he needs his anal glands expressed? He leaks yellowish clear stuff on me sometimes when he sits on me, and it smells strange. I know they say they do the butt scooting if they need it done, but he doesn't do that. Whats up with him?