Hello. So, main qustion is, How? And how better. For example.. Keep that cockerel seperate from flock there for few days. Or keep it seperate from that flock wher im going to put him. Its 15 miles away. So how to take away. In dark, not in dark. Take him there, and put in night, as he wakes up, he just wakes up in new place. Opinions? Vacinate him before? Im gonna give him and hens a pig probiotic food for first 2 weeks.