We have a couple litters of fox around this spring. They are cute and unafraid of us and machinery. Then one of the dogs came up with mange. It so happened one of my sons and grandson ran one fox down that had a bad foot. The fox pup was covered with mange. I did some reading and mange is species selective but can be passed among canines. I read Ivomec worked for mange so I used it pour on 1 ml/10 lbs. I had cattle pour on so I used it as pet Ivomec is same strength. It worked very well but in some dog breeds Ivomec can be lethal. Just a little info for what it's worth. farmguy