I am copying a post from another thread rather than write it all out again. It's my post, so I can do that right?
Why do chickens come attached with so much drama?
So, the lighter colored EE had a feather sticking up weird on her breast area. I've noticed it since we got her. I thought it was due to being moved in a dog carrier and that it was just ruffled. Anyway, I decided to take a look. She actually had a gash. I'm not sure how long she's had it. I almost think I did it. It is about 2 inches long and 1 inch wide in the middle. It's like her skin was peeled back.
I feel so bad.

She was a trooper while I trimmed her feathers and the dead crusty skin. I rinsed it and put some neosporin on. I put her in the larger dog crate with fresh bedding and then put her on the roost when everyone else went up. I did this for 2 reasons - she has obviously been running around like this for days and it hasn't phased her and plus she's in the middle of integration.

I will go out before they wake up and tend to her then re-crate her. Her feathers cover it, so I will have to see if those are sticking to her or if I can leave them to camouflage it.
Anyway, the reason I think I might have done it is this - I put a different girl in a smaller dog crate carrier while we caught the black one. She looked like the light ones twin. When I opened it to put the black one in, the first one escaped.
This one was up in the coop, so the lady thought it would be easier than trying to catch other one again. Since I didn't want the black one to escape, I opened the door just enough to put this one in. This small dog crate has some metal where you squeeze to open and shut the locking mechanism. I guess she could have gotten hung up on that. When I initially checked her over, I didn't look at her breast area. Just neck, bottom, feet, eyes, etc. I puffed her with a panty hose filled with some permethrin and did notice a blood spot, but I didn't see anything to be concerned about. I should have checked her over more thoroughly. I feel rotten.