I would try Promaxol to reduce the pain. Promaxol would be a good choice for your dog. It contains the stronger LM potencies. In addition it is helpful to give Canine Probiotics with each meal, Omega 3,6,9 and vitamin C daily. (We carry the first two and the other one you can get at a health food store.) The oligotherapeutic mineral base found in the IONX products helps the body to better utilize the other nutritional substances given for a synergistic and faster response. Also be sure to give sufficient fresh water that is free of chlorine and fluoride. If you can gradually phase into a grain free diet that can be helpful too.
Please let us know how you progress or if you have any other questions.