I have a new foster cat and her 6 kittens in my house. I noticed her ears are totally black and gunky. I did some research and think its mites. I made a mixture of apple cider vinegar and coconut oil and put it in with a syringe. She went crazy scratching and shaking her head. I rubbed her ears and lots of stuff came out. Now I feel bad because she looks miserable. Suggestions?