Our Africans are 7 weeks. They've been on 18% non-medicated chick starter free-choice, with grass when we are home to let themgraze. Starting next week we'll have someone home most of the time so they can graze pretty much all day every day. We have acres of grass for them to eat. They're in a secure pen at night. So ... Would some other feed be better than chick starter? Should we continue to offer feed free-choice in their pen at night or somehow limit it? Their first couple weeks, I mixed liquid poultry vitamins into their water but have not done so lately. If they're grazing do they need a vitamin supplement? Thanks!