We currently have a flock of 7 hens. I'm looking to add some more hens to the flock this year and am trying to plan the shipment for the right time of year. I have to head out of town every couple months for work and don't want to have to keep the chicks in their heated area for too long. At what age can I introduce them to the coop and the rest of the flock? I guess I'll have to introduce them slowly to keep them from being picked on too. Any suggestions would be greatly appreciated.