One of our hens hatched an egg and we found the chick running loose in our yard. I don't know how she got out of the coop! We brought her in and put her in a glass tank with a heat lamp. She has grown fast. She is about 8 weeks old now. I stopped using the heat lamp when she got all of her feathersI have been taking her outside during the day when it is warm but i don't know when she can go back in the coop with the rest of my chicken. No other chicks lived although the hen is setting again. I have six hen and one very handsome banty rooster.