Special Needs: Lucky weighs 8 pounds and is 4 years old.  He gets along with some dogs but not others. We don't see any particular pattern, it's just his character. Also, Lucky has a funny bow legged way of walking but it doesn't slow him down at all! The vet said he was born with deformed patellas and his ligaments are involved too but he is not in any pain. It just involves his knees - not his hips. He said as long as Lucky doesn't gain any more weight or run any marathons that he will lead out a normal life like any other dog.