Oh my god.. That poor snake MUST see a vet. That is a very large area of exposed spine. You can not treat it yourself. Things like neosporin, bactracin, etc, are not supposed to be put on large open wounds. It also would need antibiotics. That wound will cause constant severe dehydration. It will cause the snake to not eat for a very long time. The truth is, the amount of pain and stress this is causing is not worth it. There is not even any guarantee that all that skin could ever grow back. IMO the best thing would be to put it down.
