I'm still a NEWBE, I was told that using a broody is the best and easiest to add new chicks, the mama will take care of them and by the time they are on their own they are part of the flock.
When I one of my pullets went broody I got some fertile eggs from other members. They are right.
the 6 little chicks are fitting right in. Last Tuesday Mama hen moved her brood to one of the coops. Not only that, she moved into the coop with the most dominant hens/pullets, they will not stand for anyone else to roost. The first thing Mama did was clear the coop. Then after she was settled the other girls were allowed in. For the first 2 weeks I kept her and her chicks in a separate pen secure from the wind and drafts. I did put a heat element in so there was a warm spot.