I like my chicks outside. I think it is healthier for them. When they are just a few days old, I have often put them right in my garden, they are not big enough to cause damage, often get to eat bugs, and can hide under the foilage durning the day. I put a cardboard box in there, with the chicks inside the box, and usually at dark, they will walk back into the box.
I do not get chicks when it is still cold out if I am brooding them myself. I will only raise early chicks under a mama hen. And I let her take them out almost immediately.
Mrs K