I'd leave off the sod in that small qan area. The birds will kill it in a week.Once they are used to their coop, perhaps you can let them out to graze when you can watch them.I got a few pics. Not exactly the best to show off their form, but that will come later. DH is learning to take chick(en) pics, and they were not very cooperative. Better pics later on.
The white on them is sand. They are black with magic green sheen. The sand also reflects, making their undersides appear lighter than they are. I will be adding sod, but haven't got it in there yet.