You probably already know but - chilblain ointment is really good for encouraging hair growth and reducing scars..my boy impailed himself on inner foreleg right through to the bone on a "horse fence".
32 staples and massive wound and vet bill...but after using honey when the scar came up added chilblain ointment every night and morning (apparently it thins the skin and increases blood flow) it encouraged new skin and hair folicles...you can't even tell where it was and it was almost as impressive as Danny's - just don't get it on your own skin if you are diabetic.