I'm not new to raising chickens but I am new to raising silkies. I have one in particular that keeps tucking its head way under it's body. When I hold it, it nearly stands on it's head and somersaults over it's body. She also full extends her neck and spreads her wings. Lethargic and won't eat or drink. I'm feeding Medicated Start and Grow, changing water twice a day litter every few days or so. Born 11/14/11 from MPC, I separated it from the other chicks (assorted layers) and have placed a heating pad under it's individual box. Nothing out of the ordinary on it's body, vent is clear, but behaviors seems to be neurological? She makes a quiet snapping sound with her beak, like grinding teeth. She did peep at her flock mates when they made complaint noises. Please help! I'm in panic mode and the avian vet won't see her until the 5th!