Is it a shelter cat? My dad jokingly says he got a "Defective" cat from the shelter. He's round with stubby legs and he has to guestimate every time to judge if he can jump up on furnature or not. I think he might have had an accident when he was younger and now just sort of deals with his handicap. He's definately defictive compared to my Pipin, who tried to jump ontop of a high shelf, held on with his claws for a couple mins and plumped to the ground. Mom said it was a comical fail.. though could have done damage to the antique furnature lol.