The oil will 'drown' the mites in the hair follicles.

I just inherited a puppy with the same thing. One mid size bottle of olive oil. Two treatments over the first week and now three weeks later he is no longer naked.

Your call. Your dog. Your money.

The purple spray is the most effective skin treatment I have used. Period. I wish I had met the old crazy lady that turned me onto it 40 years ago.

Best of luck. Hopefully you get it figured out.

EWO