Hi I am new to chicken raising! I have 6 three week old pullets(2 buff orp., 2 RIR, 2 Barred Rock). I have been strictly feeding them chick starter, and I was wondering when I can start incorporating other things into their diet? We bring them outside to play daily and they peck at insects and such and they love it. I have found a list of approved foods on this site, but I haven't found at what age they can start.