Hey everyone I have 10 buff orpington chicks that are 4 weeks old and they are in my living room in a homemade plywood box I built it's 2 feet wide x 3 feet long x 2 feet tall. I have a low wattage 25 watt bulb on them now. I live in Michigan and it's cold right now 30's during the day/teens at night and its a very cold beginning for April. I have a A-frame shaped 8'x8' chicken run covered with a tarp attached to my chicken coop and 2nd chicken run attached to that is 10'x10'. I want to move the plywood box and the 10 buff orpington chicks outside under the A-frame tarp covered chicken run. At what age could the 10 buff orpington chicks in the house be moved out the A-frame tarp covered chicken run? The adult chickens in the coop will not be mingling with the 10 buff Orpington chicks I blocked the entry off. Also the adult chickens in the coop were in that run recently. Any cautions I should take for disease prevention?