When we bring the little ones home from Rural King they start off inside the house in a rubbermaid container with a heat lamp over it. Next, they move on to an old horse water tank locked in the chicken coop with a heat lamp close to them. Once they have some decent feathers and the weather is warming up I move them to the coop with dog fencing around it to make it smaller. After about 2-3 more weeks of improved weather and feather growth they get the entire coop to themselves.
BUT - this year I am going to figure out some kind of outdoor grazing space for them that will keep them safe from Quinn and hawks.