You would see dark brown gunk in her ears (or maybe only one ear). You can get stuff at the pet store for treatment or from the vet. You put the drops in her ears and gently clean the ears with cotton swabs. My cat doesn't like the liquid, shakes her head, and sprays it all over me and the bathroom. Bella probably won't like the q-tips very much either, but ear mites are nasty and need to be treated.