I was just doing some research to find out when I should discontinue medicated feed for my "chicks" and learned that I've been feeding it to them for far too long. They're 17 weeks! Have I done any harm? I could have sworn that the early research I did said to feed them the same food up until I switched over to layer, but now I see that one bag of medicated feed would have been sufficient. If I switch today, should things work out fine? They're all heavier, dual purpose breeds, and aren't due to lay until closer to 22+ weeks. My 3 Easter Eggers may be the only exception.