Either the pieces are too big and the chicks ignore them until they grow, or the pieces are an acceptable size and the chicks eat them. Either way, the chicks are not in any danger.
Most likely, the chicks pick through the grit you give them, throw most of it on the floor, and eat a few bits...
Grit is little rocks.
Sand is little rocks.
But sand might not be the right size rocks.
Rocks that are too big will get ignored by the chicks. Rocks that are too small might get eaten, but will go right through the chicken instead of staying in the gizzard to grind up food.
Buying grit is one...
On this site, discussing real chickens, I would prefer to see real photos. But as an image, I think that AI one is a pretty good imitation of of some styles of real photographs.
Assuming that were a real photo, I would take it as a deliberately composed scene: a colorful backdrop, a potted...
I figured there must be some age that does eat 1.5 ounces in a day, so I was just wondering what age it was :)
But how much in the crop at a time also makes sense for that amount.
There are some times when it works, and some times when it does not. But the amount of research and learning you need, before you can accurately predict what will happen, is more than what many people want to do.
But chicken foods pretty much can be sorted out by looking at protein and calcium...
Chick starter will usually be about the same as Flock Raiser or All Flock feed.
Chick starter can be fed to chickens of all ages, exactly the same as All Flock (provide a separate dish of oyster shell so the laying hens can get their calcium.)
If you are looking for a certain kind of feed and...