We've had these hens (we have two) for almost a year and they've been free range since they were about three months old. They roam our property during the day, roost in a cedar tree at the corner of the driveway at night. We've been okay with that arrangment. My neighbor recently had something get a couple of his hens, during the day, and that led us to decide to go ahead and build a run for ours and keep them confined. My husband had built a coop back last fall, but the hens have done so well, we've not used it. So, he put a covered lot around it and we moved the hens in last night. The coop is tall, with three nesting boxes in the bottom full of hay, where it is open, and then a roost up farther in the coop, where it's closed in. They go in at the bottom and then can roost up in it, out of the weather. The run itself is 10x14. I know the hens are not happy right now, but it's for their own safety. I've ordered another load of sawdust/shavings for the barn and will put some in the chicken run, and also plan on moving in a small log with some branches on it, for them to play on. Now, they're going from free range, getting scratch feed once a day in the barn, grit and bug catching throughout the day in the yard and fresh fruits and veggies a couple times a week. They're fat and sassy hens. I know now that they're confined, I'll be increasing their feed, and I'll need to add something for them to use as grit. Do you guys prefer oyster shells or ground egg shells or something else? And how often should I give it to them?