I have a pair of 9 week old chicks in my house. I have been observing them for 3 weeks, about to put them out with the rest of the chickens. The one tonight is acting wierd. like she is trying to swallow over and over and her croup is as hard as a rock. they ran out of chick feed today and when I got home and fed them, they attacked it like the were ravenous. could she have eaten too much? what should I do?