I think Ruf is like that. He seems really stiff getting up to the couch. He kinda falls off it. I might take him to the vets, i think there is pills for arthritis or something..It's getting to the point where he can barly use his bowels right..if your not right there waiting for him to eat, he'll leave a mess. Thats not that bad I guess..does it mean anything other then he's old?