My Greyhound is at the vet quarantined because he nipped at a child but did not draw blood. That is not the issue. The vet just called to say he is straining to urinate. Would this have anything to do with being stressed out at being at the vet? He has been drinking a lot of water. They want to do X-rays and possibly surgery for bladder stones. I am supposed to bring him home tomorrow. Should I do this first and watch him for a couple of days to see if he is doing this at home?