I've got 25 2-week-old (assorted sr brown egg-laying) chicks. Cute as all get-out and making me feel like a first-time-mama all over again... Went through the 5lbs of starter we got from the hatchery in about a week so I bought the 50lb bag of Purina medicated start-&-grow (?) and a week later the darn thing is much more than 1/2 gone. Am I over-feeding? Is that even possible? I don't mind feeding them as much as they want, if that's the right thing to do... I read all the books... I thought I was ready!