Just picked up my babies yesterday. Six Barred Rock and six RI Red. My husband bought medicated feed for them. Is this okay? The feed store employee suggested it, but I'm not sure. They all seem to be warm and happy, eating and drinking well, and cute as a button. How old do they have to be before they can move outside? They are presently living in a bin in my sunroom. We are still building the coop. How long do we have to get it done?? Thanks!