I got my first chicks almost two weeks ago. They have all been doing great until last night. I noticed that one of my chicks was laying down when it was eating. I've been gone most of the day, but noticed when I got home that she was doing it again. She seems lethargic and didn't protest when I picked her up, which is unusual. I made her stand, and she walked to the water and drank, so I don't think there is anything wrong with her legs. She is under the lamp and doesn't act too cold or hot. She doesn't have pasty butt, and I haven't seen her poop. What else should I be looking for? She is just laying on the floor sleeping a lot, even though the other chicks are up and active.