Has he tried Chelation Therapy? It opens all veins and capillaries. The EDTA Therapy in chelation will clean the tarter build up giving him better circulation, following feeling and better chances of healing any wounds. Check with Dr. Richard Hill on University in Davie, FL. His Diabetes patients have shown excellent improvement. The therapy is all over the US and most Insurances will cover the treatment. Massage Therapy on a regular basis and leg elevation is also helpful. Plenty of excercise. Medications such as Ultra Chromium Picolinate will reduce his need for insulin intake. He must monitor his sugar, eat 4 small meals a day and watch his wait.