I have a 5 year old neutered male Tuxedo who still walks like a kitten. He is quite healthy but cannot jump too high. He has adapted to his handicap by being resourceful and using upper body strength to go higher. He came to us as a feral kitten from the woods and briefly lived in our garage until we domesticated him. I am wondering whether he was injured as a kitten or his underdeveloped rear legs are a congenital defect. Has anyone seen this condition before? Thanks