Our chicks will be three weeks on Monday. The original brooder wasn't very tall and we knew it would not last long. Well last weekend we saw them fly and perch on the edge. We took that to mean that we needed a taller one. So we used two old doors and some scrap wood and made a good sized, taller brooder. Well today we go out and find that two are perched on the edge. They are in our garage, it isn't super cold up here, from MI so just getting to maybe feezing at night doesn't seem very cold. Our garage doesn't get very cold either. We have a heat lamp on them obviously. Should we worry that they can get out? I am figuring they aren't going too go far and get chilled. We already suspect that a few have gotten out but have gone back, found some poop. So just wondering so we worry and put a screen or such on top, or just let them go? I am stay at home kinda mom so they never go very long without being checked on.