Today is Wednesday, on Sunday morning I went out to let the girls in their run and found that a Red was lying dead, looking healthy no signs of trauma until I saw her bloody swollen rear end. Also found a piece of her intestines lying a few feet away, horrific it was. Saturday had been busy they were let out in the morning, closed up after dark, I spent no time with them so I do not know what condition she was in on Saturday. I researched and concluded she had prolapsed and from the looks of things others had picked at her rear/intestines as some had dried blood on their feathers. I read two threads that said it is congenital, life went on. Today I find my brown leghorn sitting perched up high and closing her eyes, upon picking her up she too had rear end issues, this is her in the picture above. I do have a feather picker in the flock, she is a Black Sex Link, now 3 years old and has been picking on the new girls this summer. The news girls are 5 months and starting to lay. The new girls were introduced to the flock in July and have done well except for my picker Black Sex Link. One thread I read today said Coccidiosis can cause prolapse, but I am not finding that information anywhere else. Any help here would greatly be appreciated. 2 chickens with prolapse in one week and they are different breads raises big red flag! This Brown Leghorn in the photo is missing her tail feathers thanks to the Black sex link. I have brought her in, cleaned her and she is resting in a box. Going to go get Preperation H, reinsert and set up a dog crate in the laundry room. Should I treat the flock?