We handle our chicks everyday when we clean the brooder and feed them. It makes it easier to handle them when you need to. After we move them to the coop and pen we continue by just touching them when we go out to give treats or scratch. Always remember to wash your hands after you are done messing with the chicks. And you shouldn't let small children handle chicks either. You never know what they may have even if you get them from a reputable hatchery.