Well i did use it on my Guinea pig for mite's Most if not all (not 100%)Mites don't show up on skin scraping's.
I have no experience with it with dog's.
Demodex Skin Mites In A Dog and Human at ThePetCenter.com
Info about guinea pig mites
Guinea Lynx :: Mange Mites
We went to a exotics vet We did not do it outselfs I do know if given to much it can kill them.