What kind of bees are these? Do you use a deep litter method? While mowing grass I hit a nest in a pile of clippings. Nasty things they were. I sprayed them but didn't help much. Later I noticed the nest had been torn apart. I think a Skunker did it. I also had them in one of my raised beds once too. Any chance it's warm in the coop and they're in the floor?