Hi folks, I'd appreciate any help or suggestions. Situation is this: Raquel is a 10 month old Barred Rock hen. We keep the chickens in a large back yard with access to their henhouse and the back porch, which is roofed. She seemed in perfect health at noon. We've been having heavy rain all day and the hens were all hanging out on the porch. I think at some point someone else in the house shooed them off the porch and into the coop. I went out at 5pm just now to feed them and couldn't find Raquel. She was standing under a bush with her eyes closed and her feathers fluffed up. Her feet are very cold. I brought her in the house and now have her under a heat lamp. She can just barely stand, won't open her eyes and her beak is slightly parted as she breathes but I don't hear any whistling or rasping, labored breathing. I don't see any signs of wounds. What could have happened to her so fast?? What do I do?