I had a lumbar block done at 9yrs 5 mo.s and it worked great for about 3 days. Man did it feel great to walk and not hurt or play and not hurt. I even rough tumbled my dog. I don't know why your dr doesn't think it would work after just 2. But then again each person reacts differently to each treatment. I hope you get the right treatment for you soon. Keep smiling and positive.