I don't give them grit with the meal worms. My chicks are outside now, so they get plenty of grit on their own by eating things from the ground. My hens (not the chicks yet - too young and just moved out to the tractor) free range for part of the day, so they don't ever get grit. I read on this site that if the birds are outdoors and have access to soil, grass or other media, that they get enough grit through those things and added grit is not necessary. I've never had any problems with them.