Hiya, and welcome to BYC!
As far as products, the chicks in my brooder get Kalmbach's Flock Maker and water. That's it.
One of these little ones seemed to be breathing heavily and aloof. I gave it some Poultry Cell water and left it for an hour. I came back, and I couldn't figure out which one it was as it apparently made a recovery.
That's about it. I don't give anything for treats until they are a few weeks old, and then only scrambled eggs. If you give them anything else, they'll need grit.
You'll find lots of other good info in the Learning Center
@BoundlessLove linked for you. Otherwise, it's under the Articles tab.