I have a Columbian Wyandotte that I found with a tear to the right side of her head below the ear when she was 7.5 weeks old. She did it outside shortly after I let the birds out to range. She kept scratching at it with her foot and she had blood everywhere.
My DH and I took her in and washed all the blood off of her, flushed the wound with dilute betadine and held a clean gauze to it to stop the bleeding. We kept her a small crate in the house overnight. We put the crate inside the coop the next morning so she could be with the flock. We did not let them out of the coop/run as we were going to be gone all day. When we got home, ALL birds were in the run! She had figured out how to get the crate door open. No one bothered her and she has healed fine.
Below is a picture of her. She is also light in color. I think if you get the wound disinfected and there is no active bleeding, she will be okay.
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