Here's my silly question: Should you be able to see your chicks breathing when they roost? My 2 chicks are almost 3 weeks old. When they "roost" on the the piece of firewood I have in their brooder, and scrunch down, I can see their little bodies moving up and down with their breath. Is this normal??? Otherwise, they seem perfectly happy and normal. Very active, eating/drinking/pooping, working on flying, etc. Please tell me I'm just looking for things to worry about.