Our layers came old enough to put in the coop with a heat lamp, and they were fine. Fully feathered out, no problems. (They were between 4 and 5 wks old when we got 'em from the farm). I'd set up a brooder for them, expecting to use it. Never did. Not sure how it'll function, as it's not been tried. I ordered 25 day-old Freedom Ranger chicks, set to arrive 4/6. Our brooder is a humongous rubbermaid tank (think small stock tank) with a homemade 1/4" mesh wire lid. I know it'll hold 25 chicks for the first 7-10 days, then they'll outgrow it. As the weather won't be condusive to put them in their tractor on grass (well, with this wierd winter, maybe the weather will be!), what do you use for a bigger brooder? Or do you put them in a tractor with heat lamps? I'm building modified Salatin style tractor (10x10), will that be sufficient for 25 birds? (I'm thinking I'll need 2 of them - as it was tight for my layers last spring, there were 12 of 'em). Thank you for your input.