So pooch is a 9 year old greyhound. He has a touch of arthritis in his front left leg which causes him stiffness and a bit of soreness if he's cold. Other than that he's fit and well. This morning we came back from our early AM walk, soaking wet. He came into the house as normal, went into the lounge, gave a great big 'wet dog shake' and instantly started screaming and crying and holding up his left leg. Since then, he won't get up off the floor not to eat or anything. He's clearly hurt himself but what on earth could he have done just from shaking himself? I rang the vets this morning and they are going to ring me back around lunchtime to see if someone can come out and look at him. In the meantime, I was wondering if anybody has a clue? Could he have sprained something or twinged a muscle?