I've had my 10 Buff Oprington chicks for 3 weeks. All are doing great, but one. Her body is 1/3 of the size of the others, but her wing feathers are normal sized, with other feathers developing. She acts disoriented, and walks in circles most of the time. She also spends most of her time under the heater and is fairly lethargic. The catch is that she eats and drinks well. I noticed her stool for the first time today and it was liquid with what looked like undigested food. I've read that it could be Runting-stunting syndrome, but I'm not positive. My main concern is if it's contagious. I can handle it if she dies, but I want to make sure it doesn't spread to the rest of the flock. Any help would be appreciated.