Our Red Star hen is limping. She is favoring one leg. To me it looks slightly turned at the knee, but I'm not sure, both legs feel the same. She comes out of the coop for a few minutes but then goes back in to lay down (our ground is pretty uneven so it's hard for her to walk). But other than the limping she seems fine. This is our first time having chickens, should we take her to the vet or will this heal? Thanks.