Okay, after much debate and research and input from the kind folks here in the BYC forums, I have decided to go with the medicated chick starter. So my question is, if I am feeding that from day one, and it is warm and dry outside, how long do they need to be on the medicated feed before I can let them outside for some outdoor exploring? Or in other words, how long do they need to be on the feed before I can reasonably expect it to have helped their immunity? Pick up my chicks on Tuesday and I can't hardly contain myself!!!!