I recently discovered that one of my 10 hens has scaly leg mites. I did some research and found out that they can be treated by putting Vaseline or vegetable oil on the legs. I also learned that the whole flock needs to be treated as well as their coop. My questions are: 1. How do you apply the Vaseline or vegetable oil to the legs? With your hands? Dip them? 2. I read that the mites in the coop can be killed with Sevin dust. This sounds easy enough, but I have concerns about putting the girls back into the coop after it's been treated. Won't the Sevin hurt them if they eat some? Thank you for your help.