I have a bunch of 8-week-olds who spend all day outside in their run. We have rocky soil, and in addition to that, I have scattered about half a bag’s worth of chick grit on the ground for them to find as they scratch around. Is that enough, or should I put grit in an obvious container to make sure they eat it? The run bedding is dry grass clippings, dry leaves, twigs and other yard waste and they love scratching through it, down to the soil.