That doesn't look like a wound resulting from other chickens to me. It looks more like a predator got her. But, once a bird is bleeding then the other hens will peck at it because they are attracted to the red. I'm so sorry for you girl!!! Thanks for posting the picture.
Be sure to look around your coop and run and see if there is a breach in your security. I definitely think you are looking for a predator. Maybe a BOP.
Be sure to look around your coop and run and see if there is a breach in your security. I definitely think you are looking for a predator. Maybe a BOP.