My 3 yr old RIR Rhoda has been acting a bit lethargic the last 3 or 4 days. She still eats and comes running with the other girls when I have treats, but I notice her just standing there kind of spacing out sometimes, and she usually has one of her legs lifted a little and her toes curled. I don't thnk she has been laying, but she is 3 and with 7 older hens, I only have 2 that are laying regularly. She doesn't have any problem walking, no wing drooping I can see. She does have a lot of poop under her vent, but so do several of my hens right now. We have had a few days of very hot weather (this last weekend was close to 100), but my yard is almost all shady, and they have access to sprinklers every afternoon. My first thought is botulism, but I am not noticing any real paralysis and she doesn't seem to be getting worse, just not better. I have checked them for mites but I never see anything and I hate treating for something if they don't need it. Could mites/worms cause this?