My son and daughter in laws mini schnauzer is 10 almost 11. In the past 2 weeks while sleeping he has cried out in severe pain and seemed to be almost frozen in place. Usually a very independent soul he has become very clingy and needs constant rubs. Took him to vet with three possibilities, seizure, brain tumor, or spinal cord problems. Vet prescribed prednisone and a muscle relaxer, and a steroid shot. The attacks have increase and meds seem not to be working some loss of bladder control. Appetite is good. We've had a second visit to the vet he doesn't recommend x Rays. Help we are lost.