Frodo, God bless him, doesn't really like to groom himself. He's a big boy (big boned, not pudgy) so maybe it's a contortionist issue. His tail is just unreal. It's just so dirty and brown, pretty much the entire length of it. The skin is really oily. My husband tried brushing it the other day and a big clump of hair came off! I looked at the link for hair and skin problems but wished it had pictures so I could compare. Any ideas? He's been on the same IAMS forever but lately it's just so gross.