I'm new to all this stuff. Been working on a coop (which I'll post pictures of shortly) that's almost finished. We have 8 chicks that are 10 days old. 3 leghorns, 3 bar rock and 2 aruacana. They're all doing well and growing fast. Is it okay to drop insects and/or worms in the brooder once in a while? Or should they be on a strict diet of the chick feed we bought?