Unfortunately it is really difficult to keep your dog or cat earmite free for all of it's life unless you never let it outdoors. Chester was diagnosed with earmites last week when he went to the vet's office. My roomate just got a new kitten and that's where we think they might have come from. Also, my dad's dog had earmites and he treated them, but my roomate took her daschund up there and they were probably transferred to him before the medication was completed. It's so difficult... especially when you have a lot of pets like we do in our household.
One thing I was wondering and I hope someone can answer this, is it really necessary to sanitize EVERYTHING in the house, like bedding, litterboxes, food bowls, carpet and such after an earmite ordeal? My vet said yes (but as has been stated in other posts, I have big issues with her), but I read on the internet that the eggs and mites die quickly after leaving the pet. That's why they can't survive on humans... Anyway, just curious if anyone knew.
Glad other than that your Bella is doing okay!