1 week old boxer puppy's tail lost hair and is raw. Please help!?

Our boxer puppies are 1 week old. 5 days ago they had their tails cropped (which was advised by our vet.) Today one of them lost all of her hair on her tail and it looks very raw and irritated. I cannot get her into the vet until tomorrow and I am unable to reach anybody. Should I put neosporin on it? I was told by our vet to put neosporin on their umbilical cords, and I wasn't sure if maybe I should on the tail as well. Please help! don't want her to get an infection or be in pain.