My chicks are now 4 days old. Tonight I removed the paper towels and put down a good inch or pine shavings in their brooder. They seem to love it quite a bit but they are picking up the tiny pieces and eating them. From what I read on several other posts is that they will eventually figure out the shavings don't taste good. Should I be worried if they eat too much if any at all? Also, should I be sprinkling some grit in the pine shavngs? I have them on Durmo chick starter.