My cocker spaniel is 6 years old and about 10lbs. Overweight. He ran down the stairs too fast and somehow hurt his hind legs. I noticed that he was trying to balance himself but kept falling. I took him to the vet and the vet said he really couldn't say exactly what was wrong. From the x-rays he did it looked like calcification in the spine. His hind legs were becoming paralyzed. He kept him overnight and gave him a cortisone shot. The next day he was walking but very slowly. When he had to go to the bathroom he could not lift his leg. He had to squat. The vet said he was much better from when he was brought in. That it would take a while before he was 100% better. Once home he tried to go up the stairs. (only three) I called the vet. The vet said he really shouldn't but if he was attempting to do this on his own, then he was probably feeling better. Is there anyway I can help my dog strengthen his hind legs or should I just let it be? The vet wants me to call him after he finishes his meds, or before that if I feel like something is wrong. My dog also after walking a while will drag one hind leg. Not bad just a little. I don't want him to hurt himself but he gets up on his own to walk. Do you think this is OK? I don't see any possible way to force him to stay put. Any advise would be appreciated. Thanks.