We went out to move our chicken tractor this evening. It has been sitting there since last fall, with over 12 inches of straw. Grass has grown up through the hardware cloth we anchored at the sides to keep out digging preditors. As we were pulling up the grass to release the mesh, yellowjackets appeared and stung one of us. I am unsure how to deal with this. They are in the straw or ground under the tractor. I don't think I can even spray them because I can't see the entrance. I'd burn the straw, but it probably is too damp in the lower layers, plus, my tractor would burn. How do I deal with this. It's beside my coop and I don't want to expose my hens to poison. I am so thankful this wasn't later in the season when they get aggressive.