We noticed our RIR hens/ rooster today scratching at the ground then rolling around in the loose dirt. Their normal pen has a wire bottom to keep critters out but they were in the daytime pen which has grass and dirt. We were thinking they were just dusting themselves but we wanted to check with our BYC'r friends with more experience. Is this normal behavior or is it a sign of possibley mites or something. How do we tell if they have mites and if they did have mites how do you get rid of them. Thanks for your help!