So far, I would just wait for the hen to heal her wounds, and regrow her feathers. I don't really see why you would 'need' to give her extra protein, unless you want to speed up the recovery time. I assume that nature takes care of it. What I would worry the most is the wounds, making sure they don't get infected.
Having said that, go ahead and give them (not just the injured one) the extra treats, they'll most certainly will help her recover and keep her defenses up, and it won't hurt the others to have healthy treats like what you mentioned. I'm no expert, and I take back what I said about cat food and corn, I actually don't think it sounds healthy anymore, thanks to ChickenCanoe, I'm amazed at how misinformed I was and how much I learned.
God luck and God bless
Having said that, go ahead and give them (not just the injured one) the extra treats, they'll most certainly will help her recover and keep her defenses up, and it won't hurt the others to have healthy treats like what you mentioned. I'm no expert, and I take back what I said about cat food and corn, I actually don't think it sounds healthy anymore, thanks to ChickenCanoe, I'm amazed at how misinformed I was and how much I learned.
God luck and God bless
