Chicks are fully feathered and 7 weeks old and growing like weeds. We live in south central PA and have had some crazy weather. Can I put them in the outside coop with a heat light now even if the temp would get down to 30 or a little below? This morning woke up to 25 degrees. We have them in our garage but are outgrowing the portable coop in the garage. The outside coop is completely enclosed with a heat lamp. Thanks