Your chicks are absolutely adorable! I read about sand and switched over in my brooders but a couple days later, one of my chicks went cannibal on me. Later, I read that that's common with sand in the brooder. Honestly, I don't think sand is worth it. Finding one of your precious chicks all bloody and injured just isn't worth it to me. Plus, sand stinks BAD. lol Anyway, I hope you have better luck but PLEASE keep an eye on them.
This all went down while I was sitting in the next room. I didn't hear a thing.
Just offering a little advice that I wish I had read BEFORE my baby got hurt.

