Here's my situation. I have 11 mixbreed chicks outside. They're about 8 weeks old. They came with a hen and cock that my folks gave me and was hatched and so far raised outside. About 5 or 6 of them are silkie mixes and are smaller than the rest. I got them at about 2 weeks old, and just kept them outside like the folks did, as they were already used to it. I have 8 6 week old purebred chicks in a brooder inside. They arrived to late to slip in with Momma Hen, so I kept them inside. They are mostly feathered out, but still have down under their wings. I want to integrate them, but am afraid they may be too young still. They're the same size as the silkie-mixes, and they're similar colors to the barnyard mix, so I don't worry about picking. However I'm worried about the temperature change of going outside. It's only a 8-12 degree difference, but I also have a heat lamp available for them inside, and I don't have one outside. Granted, there's plenty of warm bodies though. I thought about gradually sending them out, and though I have a garage, it's OLD and isn't much more protective than the coop is. I also don't think I can fit a light inside the coop as it's small. So, I'm not sure, but I think I should turn off the heat lamp today. It's 1-2 feet above their sleeping area, but they stretch out and wake up throughout the night, so I think it may be getting too warm for them anyway. In fact, one of them is sleeping on the other end of the enclosure right now... When can I send them out? Their "dust" is getting everywhere, and that includes inside my lizard's tanks (which, it's not nice for Jak and Morgan to go after a cricket and get a mouth of fluff-n-dust instead.) and it's making more housework for me!!!