Went to let my girls out this am, found one just clinging to the roost bar, I pulled her off and set her down she was unable to stand. I immediately brought her in, we felt an egg, assumed she was egg bound and gave her a warm Epsom salt soak. She passed the whole egg but didn’t really recover. She was very lethargic, closing her eyes, not holding her head up. I gave her a heating pad, some towels, electrolyte water and put her in the bathroom. This afternoon she has perked up considerably but seems to be very weak, she makes attempts to stand and then sits back down. I was looking at her vent, it looks normal, then I found some poop under her. It was weird looking, dark green with some yellow. She was literally perfect yesterday- laid first thing like always, was wandering around like always eating, drinking. They get layer pellets and oyster shell and treats only occasionally. Any ideas on how to procede next?