I use stuff called fura-zone. you can get it from tractor supply. i have a hound that runs the hair off his tail all the time. got so bad one time didnt think the hair would grow back. it would start bleeding just by him wagging his tail. starting using the fura-zone and it healed up and his hair grew back. not the same wound but sounds like it might work for you. make sure you use gloves if you it though.

Fura-Zone 0.2% Nitrofurazone ointment is used topically for the prevention or treatment of surface bacterial infection in wounds, burns and cutaneous ulcers.
http://www.tractorsupply.com/fura-zone-0-2-nitrofurazone-16-oz--5201871

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