Some will say it's a big no-no (I guess more for a cat than a dog) but when Pebs 'injured' her wiskers from her jail break attempts. I just shaved 'em off with clippers and let her grow new ones. If not your just going to have to wait until they fall out and re-grow on their own. I'd say by week 5-6 you couldn't even tell that I shaved them off, they just looked odd b/c they were short. I believe that vitamin E is good for scars and hair growth. Just get the liquid from your health store or pharmacy and massage his nose a little each night. The vitamins combined with the massage will stimulate blood flow and re-growth.