I was concerned of internal injuries and crop damage after my hens attack. My experience is that if she has too much internal damage she won’t eat or drink much. She may not lay eggs for a while due to the scare. If you find punctures or wounds I recommend injectable penicillin so she doesn’t get infected. I can send you info on this if you want.
for the moment keep her in a warm comfy area away from other chickens so she can recover from the shock.
i Don’t want to get ahead of myself but keep an eye on her. After the shock subsides see how she is acting. Normal activity, feeding, drinking, pooping? Hopefully she is ok and you can just get her back to normal chicken life.
keep me updated and I’ll help you with this. Thanks!