I hatched two serama/mille fleur chicks this year--they're teeny tiny. I'm in St. Paul, MN, and they hatched May 5th. I had them in a brooder pen with a brooder plate in the house for about a week. Then I used hardware cloth to screen off a part of my run, and moved the babies and the brooder plate out there. It was a small enclosure, well sheltered from wind and wet. I don't have data to support my claims--this was my first year hatching AND brooding outside--but I think the chicks feathered out really fast. They learned the waterer and feeder by watching the big hens, and it was pretty easy to integrate the flocks. I started by giving the chicks the run of the coop while the bigs were free-ranging or in the tractor. Then I let them mix, under supervision, while everyone free-ranged or hung out in the tractor. I took down the barrier entirely when I discovered that one of the hens had figured out how to get around it and had laid an egg in the middle of the chick enclosure.

They're 4+ weeks old now, doing everything the bigs do. I'll pull the brooder plate out once I stop seeing the chicks under there at night. And I've had the pleasure of baby chicks without the hassles of house chickens. Outside brooding, without a lot of fuss about exactly what the temperature is, etc, has been a brilliant experience. Would absolutely do it again.