without seeing pictures i cant give you "great advice" but i can tell you that ive seen chickens heal from some serious wounds. ive seen hens get tore open across their back by roosters and recover just fine. ive seen several hens have a chunk of scalp removed and 3 weeks later you wouldnt know.
where is the wound? if its not near the eyes, i usually just put neosporin on it. if your having trouble getting bleeding to stop corn starch normally works well too. flower will work in a pinch.