Coping With Canine Distemper

Does anyone have a dog who survived distemper but has partial paralysis? We found three puppies and a mother living under a house. We kept the mother and one of the puppies, Chewy, and gave the other two puppies to a neighbor. Chewy had his complete series of vaccinations, but he and his mother still got sick after his last shots with an unknown illness that lasted about 36 hours and then they were fine. Several weeks later, Chewy started to get progressively weak in his hindquarters to the point where he could no longer walk on all fours after several months. The vet thought he had contracted distemper and this was the result. The mom was not immunized and she has had no effects from the illness and the other two puppies never got sick. I started giving Chewy 500 mg of Vitamin C every day a few weeks into the symptoms and the paralysis seems to have been confined to his rear legs. Now it has been over a year since the first onset of the effects of distemper He can pull himself around with his front legs but he’s too weak to use a cart at this point. He has several of those “chewing gum fits” each day but they are pretty minor. Has this happened to anyone else’s dog? I’m wondering if the paralysis will continue very slowly until he can no longer walk at all or lose the ability to eat or breathe? He has pretty good control of his bowels. He has a great appetite and clear eyes. He does not have anything wrong with the enamel of his teeth or evidence of the hard pad disease. He does have a lot of muscle twitching in his front legs especially when he’s sleeping. I know it is rare for a dog to survive distemper but I am also hoping that eventually the virus can be eliminated or go into remission from the dog’s natural immune response. Is this possible? The thought of Chewy dying a slow death is agonizing, but he seems pretty happy now and not in any pain. Any experiences with surviving distemper would be appreciated!