I'm so upset. The most horrible thing ever happened. Our chicks hatched yesterday and we had them in the brooder with their mama hen. We had split the brooder in half with another hen in the other half and separated from the broody hen and her eggs/chicks by a big piece of plywood from top to bottom. The other chicken was recooperating after being pecked by another chicken. Four of the baby chicks managed to squeeze through a tiny opening between the two areas of the brooder and they were alone with the other hen. She pecked the poor babies to death and their mother couldn't come to their rescue because she couldn't get through the plywood opening since it was only an inch or so wide. I am so thankful that I didn't have to see the carnage. But my husband did and he was heartbroken. We are so sad and feel so horrible for letting this happen. Those poor, sweet baby chicks. What a horrible way to die. I feel like throwing up.