I'm from central Ohio...not a lot of sand just lying around here so my knowledge is somewhat limited...but I think I'd read that the one concern with sand was in regards to beach sand with the potential for salt residue. Other than that, if your yard/property is sandy to begin with then I don't...
Thanks for sharing the information--I've been thinking about sand for the runs, read good reports on it, but not about the brooder use.
The "ChickenLady" on facebook has a great idea for a scoop for those who want to use sand in their coop or run (when a small scoop isn't practical)....she wraps...