Well, the frisbee didn't work, I thought it might not, they just tunneled under it. But, we left the frisbee there, and interesting scenario last night, as I watched Dazzle (our main roo) lead his flock home from our yard to the barn, at dusk. They marched in a single file line within inches of the nest. Dazzle stopped by the nest, turned around, and pecked the frisbee, or something on the frisbee, who knows.. Then he continued on, but one or two of every three chickens that followed stopped to peck the frisbee, or the ground near the nest, too. The last one in line hurried by as if she was being buzzed. So.....I had a friend tell me her hen kills bees but never eats them....and today I noticed there is very little activity near the nest....ihmmmm. Anyway, I have another remedy...you cover the hole on a cool night with like an old plastic bucket lid, and cut a hole in the lid to fit the nest hole. Then, you pour a cup of liquid laundry soap down there, then fill the hole with water and keep it filling for the next ten or fifteen minutes. They will drown. I have not tried this yet, but that is probably what we will do if our chickens haven't been killing them off for us...better for the environment, and safer, then poison or gasoline. My mother used to just pour boiling water down the hole at night...I guess that works, too. I am glad they are jellowjackets and not something bigger. We have mud dauber wasps too; they like our brick house, but they never bother us.