Had a few coyotes decide to infiltrate the hen house about a month ago and my great Pyrenees eliminated one. However, she contracted a bit of mange. I'm assuming from the effort, and I cannot find sheep dip anywhere. What are you "experts" using these days? I've raised working dogs all my life, and yes I'm old, but this is the first time in 50 years I've seen a case on any of my dogs.