You sound like a local. Unless you looked on the google earth you might not have known the sizes. My FIL lives down that way, I think his address is Hudson. I only know we take the fairview exit to get to his place then go straight east for a bit and then south. I grew up a little further north.
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I live in SD and have heard nothing about a private non-commercial flock being culled. The only ones on the news here are large scale operations. No mention of backyard flocks, so I'm confused as to where the eggs came from? Closest hatchery is in IA.