I hatched 4 chicks last week. Three of them are doing really well they always come out from under the brooder to eat drink and run about but one of them never comes out from under the brooder. It looks like it hasn't really grown and I brought it to the water and it drank a little but not much. I have no idea whats wrong with it. The only thing I could think of is that they have sawdust bedding, perhaps it has eaten some and cannot digest it? Does anyone know whats wrong and have any tips for how I can help it if I can?