I have 3 1/2-4 week old chicks that were brooded in the run with the mom. I have now opened the door and they are going in and out of the brooder into the run with the other chickens and mom with no problems (so far). Mom has started laying eggs again. I found one in the brooder when I went to put in fresh water. I also found a small egg that had broken. I have attached a picture for comparison. The small broken egg and the egg from the mom I found this morning. I know I don't have any quail so I was assuming that one of the babies laid the egg? Which seems really strange. This is my first time brooding chicks with a mom and in the run. So I don't know if this is normal. Everybody is eating chick starter right now with supplements of calcium, grit and kelp nearby for the big chickens. Is this normal? Do I need to worry?