I discovered one of my Rhode Island Reds standing in the corner of the chicken coop, with her tail down and body fluffed up into one giant ball. She usually tries jumping onto my arm, like a parrot, when I have food for them but she just stood in the corner. As I observed her I noticed that she wasn't eating, just nibbling and not drinking much water. She is 7 month old, laying hen. I don't know if she has laid eggs recently, as she shares a coop with 10 other laying hens who seem fine, except for Ms. Broody who acts very very strange when she gets off her nest. I did notice that she, the RI, weighs half of what the other two Rhode Islands weigh. Very skinny and light! Her eyes and comb seem pale compared to the other hens, they also seem like they are shrinking?! I brought her into the house to keep her warm tonight and away from the other hens. They were picking on her today and she was one of the more dominate ones of the group. She is not eating any of the food that I am offering her. She just stands in one position. No noises or movements. No discharge or sneezing. But, she does have very watery poop. They haven't been out of their coop much because of the snow, which they don't like, and the fact that it has been in the low to mid 30's. They have one little area that they can walk around in but no scratching because the ground is frozen. They have a 10X10 shed as a coop, so there is plenty of room. There roost extends from one wall to the other with drop trays underneath. They have eight nesting boxes to share between them. They also have three heat lamps to keep them from freezing. So I don't feel there is any over crowding. They do dig and pick through the poop trays. Is that normal? I am not sure of what else to say. I am shocked about how skinny she is compared to the other two. Any questions or help would be appreciated. Thank you.