
So Sorry that's what comes of looking a avatars and names thought it was a DDB - in which case forget what I said and go for lead walking up and down hills if possible, not too much but start with a few minutes and increase slowly.
If the hair follicles were removed in the accident then the coat may not return as it was but you will get some regrowth but if it was only the surface it will return to normal although it may not be the same colour, either way it should not be a problem in the ring particularly with a male.