Unfortunately we didn’t keep it and Neither have I. We have no idea how to treat it. Someone else said sloughed intestinal lining but this looks like a worm to me
Well thats ok. That is definitely not a chicken parasitic worm. Roundworms are thin and white.
That doesn't mean your chickens don't have worms because that may be the reason the intestine come out. I've seen it before in my flock. Capillary worms are tiny and I'm not sure you can see them with the naked eye.