So glad your chick is better! I wouldn't have had a clue what to do with that. One thing about the grit, when you feel like you need to give them some grit to take care of stuff other than chick starter, rather than setting out a dish of it for them (free choice) try sprinkling some on a snack (boiled egg), or mixing a bit in with their feed. That way you have control of how much they are getting, rather than leaving it up to them. A knowledgeable person here, Barnyard Dawg, described it as sprinkling it on the food as if you were salting it (but don't use salt!) That's what I do with mine, after reading posts here where people's chicks just wanted to eat the grit and not the food.