Looks like a baby chick I had six years ago. She had stuck her head through the fencing and the rooster scalped her.
I wrote about how I treated it for BYC. It's linked below in my signature line.
Basically, I cleaned the wound twice a day to keep bacteria from colonizing the wound. I painted it with Blu-kote, let it dry, then put an antibiotic ointment on it, making sure the wound never was allowed to dry out.
The chick was allowed to rejoin her mates, and they pretty much left the wound alone since it was disguised with the Blu-kote.
Warning, if you allow the wound to dry out, healing will slow to a near stand-still and infection will then become a real danger. No need to try to bandage it, by the way. Just cleanse it twice a day. It's going to take a good six weeks or more for the wound to close. I rejoiced when my chick's wound had closed up so I could barely get a Q-tip in it. Then a toothpick, then one day, it was completely closed.