About one month ago, one of my red sex link hens became very lethargic. She appeared to be molting with loss of feathers on her back and tail. Her comb became very small/pale. She did lay an egg for a few months. She eventually separated herself completely from the flock, and seemed to be in a daze. She lost a lot of weight and sadly passed away. I have no idea what was wrong. The rest of the hens were fine. Now, the remaining sex link is doing the same. Her weight is still up though, but I'm not sure if she's eating. She separates herself during the day, and appears to sleep. What do I do? She walks around very hunched up, and her neck seems to be pulled back into her body. When she's hunched up, it's like her lower back is sticking up well above her wings almost as if she's trying to pass an egg, and can't. She also hasn't laid an egg in several months. Her poop was watery and a dark green as if she had been eating grass, but I'm not sure that she actually was. I also have an EE that only quit laying a couple of weeks ago. Today I noticed her standing in that hunched up way, but she at least stays with the flock and pecks around. I will upload pics later.