That is exactly what I do. I only buy from reputable breeders. Once I leave the crate door open all night, they start to mingle with the others. That is when I leave the coop door open all day, so they have a place they can run to for security. I have never had any problems.
My birds: Chickens and Ducks, free range in my backyard. When I get new birds, first, I only get mine from a well known breeder. Never had any problems. I have also hatched out just a few. Babies are always in a brooder in the house. As they get a little older, and are able to be outside for a...