I agree she has a prolapsed cloaca. I cannot tell if it looks like she is also egg bound, but could be. Give her 600 mg of calcium citrate with d or other calcium, and pop it into her beak to swallow. You can use vaseline, hydrocortisone cream, or other mild oil for the prolapse to keep it moist. Can you feel it to see if there is an egg? I am looking for a video of an egg ound hen with a prolapse to help you.