Man, my BOs just have issues! I have one pitiful little pullet - https://www.backyardchickens.com/forum/viewtopic.php?pid=8189125#p8189125 - and one that seems healthy. But, I was just out there and the "healthy" one has runny black poop all over her bottom feathers! I don't have a clue about this stuff. I know I should but I just don't. my kids are high maintenance enough right now. Do I need to freak out or just add some ACV to her water?