Oh yeah, been there done that!! You ABSOLUTELY want to do something BEFORE skin breakdown and permanent contractures set in. We've never used the no-knuckle, and we didn't have much luck with shoes because, like you say, they're very little protection and no prevention of contractures. Personally, I really like http://www.handicappedpets.com/walkin-rear-splint
. I would also say that it's too soon to say whether the nerve is torn or just bruised or otherwise damaged. My Tristalyn was hit by a car and had radial nerve (arm) damage, but I wouldn't let them amputate. Months later she still had her arm, and it was totally normal! My Koi boy knuckled from being shot in the spine, and he was the one with contractures, so we've been there, done it all, including custom shoes and splints!