I dont feed mine grit. I feed straight chick feed for the first week, then introduce them to scrambled eggs. I dig a whole in my yard where I know there is good soil and get clean dirt. I put it in a container and then when I make their eggs I spoon in a little dirt and mix it together on their plate. They are dirty scrambled eggs. I usually mix the dirt in with whatever food supply I give them like lettuce, yogurt, cucumbers. I dont feed a big variety of food while they are small, just light green veggies and eggs. I cant justifying buying grit when mother hens bring their babies out to eat dirt. I usually go out and find worms under rocks for them too but since worms are pretty dirty already I do not mix dirt with them. Never fed meal worms..again I cant justify buying worms if I have lots of red worms in my garden and yard. I would probably mix dirt with meal worms too, maybe split them in half so they will stick to some dirt. I know its gross but it works. My chicks would kick a container of dirt all over this dog crate, so I dont leave one in. They're freaks of nature right now learning to fly and hopping all over the place!