hello! I have a hollandHloo that came home with mites. I treated her with ivermectin (paste form, in between her shoulder) waited 10 days, cleaning her cage everyday and litter box everyday. Then after 10 day re applied and did the same for the next 10 days. Now the little region that he had the dandruff and a little rash is much better and I don't see any new irritation. Examining her for the past 20 days and I haven't seen any new reaction areas. I assume the mites are gone. Is that right? How can I be sure?