Now just out of interest....
If your vet tells you there's no mites and you find out they have them a few weeks later - like they start getting bald patches or scratching and shedding a ton - does the vet treat for free that time? I ask because we once got prescribed the right stuff for mites (xeno-450 spot on lotion) but the wrong regime - it should have been 3 treatments 2 weeks apart and a young vet told me 2 treatments 3 weeks apart - so our mites came back pretty fast. The vet I saw the second time was a senior partner and couldn't apologise enough! It was a simple mistake (and now one that young chap won't make again) and our case wasn't serious so I didn't sweat it - although we didn't get more meds free we got some money off the invoice which was nice.
Glad it's not mites - my white girl always has dark bits on her back from where she squeezes into the hay cube!
View attachment 212701