Hello all, my first batch of chicks is about 3.5 weeks old now and their first bag of grower feed is on its way in the mail. The feed company says to switch from their starter feed (crumbles) to their grower/broiler feed at three weeks until first egg and then switch to layer feed. Anyway, my babies are on "chick grit" right now so that they can eat the various yummy treats I give them, but I was wondering when the time would be to switch them to regular (grown-up) grit? Since they will be on the new feed, I assume it will have bigger pieces, plus the chicks are getting bigger every day. Any advice?