I agree with auntie that earmites are very painful. They usually start deep in the ear and work their way up, so try to look down the ears with a flashlight. Ear mites typically cause thick crusts that are extremely painful to the touch.

It’s not typical for fur mites either, they tend to be at the base of the ears and att the nae of the neck, down the back. They cause patchy hair loss and “dandruff”-like skin flakes.

I’d go with monitoring for now.

(I’m guessing you’re in the US, not Australia, in Australia selamectin (Revolution, Stronghold) is OTC, but its prescription only in the USA. And now our standard public service message that we add every time we mention anti-parasititics for buns: Never use any product containing fipronil on a bun. It’s deadly toxic to them. It’s sold OTC under a variety of brand names, fipronil is the substance name.)