My lab mix is having pain in his hind quarters mostly on the right. There appears to be NO breaks, or other signs of injury. When I touch the leg, paws or even hip joint area he does not complain but while laying down if I try to lift the leg he he will yelp. When he walks now he keeps is legs close together and takes for short steps. He favors the right more but it appears to affect both sides. I have to carry him across tile floors because he doesn't have the strength to keep himself up right. He has had a recent rabies shot, 2 weeks ago.