Last night my 16 day old chicks were making a whole lot of noise a lots of activity. I figured out that the heat lamp had drawn bugs from the window and they were having a field day eating the little bugs. At this point they have not had any grit so I gave them some sand today. They tore into it like having a feeding frenzy so I took it out after a few minutes because I was afraid they would eat too much and become impacted or something. Could someone please tell me if I should or should not let the sand in the brooder with them? I'm being a bit of an over-protective mommy at the moment. Thanks! I LOVE BYC!!!