I have 15 chicks that are a few days shy of 6 weeks. They are HUGE and seem to need more room than our 3 x 5 brooder in our coat room. I was contemplating moving them out to our insulated coop this weekend. They would have a 250 watt heat lamp and will be 6 weeks then. I would keep the pop door closed for another week or so. It is in the low 50s during the day now, with a colder breeze. Nights have gotten into the upper 20s outside. The coop is obviously much warmer and the heat lamp would be low to the floor. I would watch them to see their behavior and could always move them back. Should I wait another week or two? Or would this be okay? Thank you.