I hatched out 15 chicks for the first time in a bator. They are 2 weeks old today. They have been doing great, growing like weeds. Little nuts I must say. I'm feeding them the medicated starter feed, changing there water 3 to 4 times daily and replacing the bedding ( shredded paper ) every other day. This am I noticed one of them is very listless, all fluffed up getting knocked around by the others. His eyes are closed mostly, he is standing. What do you think it is or what should I do. Do you think they will all get sick???