@lawrence-chow But surely the breeder paid for the vet to make sure he/she was selling a healthy puppy ?
Good news and a completely new one on me, that just one puppy in a litter should be so affected.
My Grandoggy, Jasper's, front leg went out of place when he jumped down from the couch. He limped for a few seconds and then was O.K. He didn't act like the leg was hurting him when I palpated the leg and joint. The affected joint seemed to be the shoulder of the left leg–closest to the body. He is 5 years old. What could this be?