I have a small (3' x 4') coop with three chickens. I'd like to provide a Windbreak to block the n/nw wind that pummels the coop most of the winter. We have a small yard with limited space. I've thought about attaching burlap to 5' poles. Or stacking hay bales. The latter I can get for free but my husband isn't too crazy about killing the grass under the bales. Anybody have other Windbreak ideas?