Ok my dad read my above post and I am going to add a few things. Right now what food are you feeding them? I found out that it's really good to give them MEDICATED chick starter. And when they are around 6 weeks old then switch them to corn or chick grower. And granite that you feed them is also called grit.
Also, when humitidy is really high, that's when they get eye infections. Otherwise they should be fine!