I have been noticing a lot of diarrhea droppings in my brooder since yesterday. At first I thought it might be my 3 week old chicks but then noticed that it is from at least one of my 1 week olds. It seemed like my 3 week olds went through a couple of days where they had diarrhea at about 1 week. Does anyone know if this is pretty normal for a 1 week old chick? Anyone know what could be causing them to have diarrhea?