During the process of revising a chicken coop, I had my 13 chicks, about 4 weeks old, escape their pen. Much to my surprise, a hen has adopted them. She has literally taken them under her wing. I don't know if this is normal or not, but I have let her have them, maybe they will be smarter chicks. Could one presume this hen would make a good brood hen after these chicks get (weaned)?