It might be a good idea to have your dog examined by a veterinary neurologist. The neurologist could ascertain whether your dog's problem is due to diabetic neuropathy or disk disease, or a demyelinating condition of the nerve cells, and other causes. If disk disease is the problem, Acupuncture, steroids and muscle relaxers have been shown to be as helpful as spinal surgery, and could be very helpful for your dog. Acupuncture can also be very helpful for diabetic neuropathy.
A dietary change, if possible would also be helpful. Please use an all canned, grain and carbohydrate free wet dogfood, such as the grain and carb free varieties of: Evo/Innova, Merrick's, Wellness, Natures Variety, California Naturals, Newman's Own, and other high quality brands.
All dry commercial dog food requires some carbohydrate in order to allow the dog food meal to go through the extruder machine to become kibble, so it's best to stay away from dry food in the diabetic patient.
I mentioned in my first question the possibility of Cushings in my dog along with the diabetes. Could this be the cause of his muscle atrophy and if so, would muscle mass and the abilty to get up return with treatment for Cushings? My vet does not think this is caused by diabetic neuropathy