I got chick grit for my chicks that are 2 weeks old. There is absolutely no feeding instructions on the bag other than to monitor how much they eat for a couple days. I don't know if I am suppose to be mixing a certain amount with their food, feeding it straight to them, how much to give them?? What am I suppose to be looking for when I'm monitoring them? The directions are absolutely no help at all, could someone please help me?