My 7-8 month old EE hen is not moving around much and is falling asleep where every she makes it too, mostly in the corner. She is not eating even when I try to give her her favorite treats. I was able to get her to drink some electrolyte water yesterday and very little this morning. She is fluffed up with her tail down as well. Her poop is runny. I noticed her behavior yesterday morning but I do remember my husband saying that Penny spit up the night before when we were doing our evening chicken duties but she was still acting fine or it wasn't enough for us to be alarmed at that time. She laid an egg yesterday but it had been a couple days since she had laid with the previous egg being a massive one. I did give some Safeguard wormer for goats yesterday. She slept on the roost last night with the rest of the chickens. The coop she is in has 3 other hens that are the same age as Penny and have been together since day one. Night before last I added a rooster and hen in with her and her friends. They had been kept side by side for a couple weeks so they could get use to each other and everything went well when we put them all together. All other chickens seem to be healthy and are acting normal. Penny is my kids favorite hens because of her fluffy cheeks and bright blue eggs. They will be devastated if anything happens to her. Any idea what may be going on? I just brought her in the house and she took a couple steps and laid down on the cement floor. I have now places her in a box with some hay and she is sleeping. Please help. I am attaching a picture of her and her poo that is very watery.