Couple questions-will this type of injury even heal or does she need to cull her? And any idea what did this?
Edited by MesMama - 3/21/16 at 6:12pm
It will heal, You do need to keep hen separated until them. Other chickens would pick on an injured chicken. The wound could have been caused by predator like a raccoon or mink, weasel, and she was able to escape.
Here is a link with much good info for you to try to identify predator.
WISHING YOU BEST.
It does not look like the job of a rooster. Roosters just grab feathers to hold on to. It looks like something with teeth to me. Bandage it up loosely with gauze to keep dirt out. Wound needs to be able to dry out and form a scab that will protect it as new skin grows over. Not sure of how long, but maybe after a week it will look much better. Maybe some peeps here will suggest of putting antibiotic, or antiseptic on wound. I don't have very much experience in treating wounds. I usually just maintained them clean and did apply some peroxide initially. Some peeps had different opinions about using peroxide than I.