My cavachon has been to the vet three times in the last two weeks. They said he has hip artrites in his hips they took X-rays and then they took blood said he was dehydrated and had white blood cells in his blood. He has been taking tramadol for pain and they put him on a steroid. The problem is he dose not want to walk I had to get him stairs and now he is peeing everywhere and all this happens overnight. I think on of are big dogs May of accidentally hurt him I feel he is still in pain and for one thing I can't handle knowing he is in pain what should I do if I take him back to the vet they want to do a ultrasound should I take him in for that