Chicken is standing and won't move

[Huck926]

I have a 6/7 month old Rhode Island Red that has been standing perfectly still for at least two hours now. I noticed her over by a fence line with her back end raised up high like she had a big arch in her back. I thought maybe she was going to lay an egg, even though it was the evening and she wasn't in her nest box. I watched her for an hour and a couple times she let out some yellowish mucus or poop. I thought I could see the egg in the vent about to come out, but now I'm thinking I didn't see an egg. I've never watched them before and I'm new at all this. We moved her to their fenced in area because it appeared she wouldn't move even if a predator snuck up on her. Any suggestions on what's going on? Is she constipated? I can't seem to put in the right words when searching to see what's going on.

Thanks.

 

[Judy]

She could be eggbound, or an internal layer, or an egg might have broken inside her.