Hi,
It could be mites but it also can be an ear infection.....or both. I don't think I would put anymore oil in her ear. Mineral oil is one thing (that I don't like either) but a lot of these oils have things in them that might not be a good thing for the working parts of the ear. I don't think I would want that stuff in my ears....and there is not much difference between a rabbit's ears and ours.
You don't need an exoticsvet to diagnose mites....any dime store variety vet will do if they are willing to do it....even an entry level vet tech could do it. All it takes is a cotton swab and run it down into the ear canal. Put the debris on a slide and take a peek under a microscope. Sometimes the little bugs are visible with an otoscope or by the trail of debris they leave. They can also culture the same way if no mites are found....and again, any of the dime store vets can do that. The tricky part of that is knowing what antibiotics can be used with a rabbit. If it is mites, the most common treatment is using a drug known as Ivermectin. I usually inject it...but it can be administered orally or trans-dermally. I use Revolution on most of the incoming animals at our rescue (including some wildlife). Revolution is Selemectin which is a variant of Ivermectin and takes care of a wider variety of parasites and is administered trans-dermally. But the safest and most effective treatment I have seen for ear mites is Acarexx. It is also a variant of Ivermectin. It comes in two ampules per container.....one ampule in each ear (it's drops). It is a one time treatment (Ivermectin requires at least 3 treatments spaced 10 days apart). Another advantage is that you don't have to clear the ear of any debris....and that makes things less stressful on the bun. It works thru the debris.
Now if it is an infection....and mites can cause secondary bacterial infections....it needs to be treated immediately and aggressively. Untreated ear infections can and usually do cause the rabbit to suffer from a condition known as torticollis....aka wry neck or head tilt. Their head will twist around. Depending on the damage caused to the inner/middle ear, the tilt may or may not correct. Infections can alsoperforate the ear drum....we have several deaf rabbitsin our rescue that was caused by untreated/improperly treatedear infections. An ear infection is nothing to play and and time should not be wasted in treating it....and it should be attacked with all guns firing the big rounds. Unfortunately most vets, even the rabbit savvy ones, are far too conservative in treating ear infections. It should be an all out blitzkrieg and attacked on multiple fronts using a "cocktail" of drugs and support therapies. I have treated numerous ear infections in our rescue. I do not play around with ear infections.
I would concentrate on a proper rabbit diet of unlimited hay and limited pellets and make sure she is properly hydrated. If she has an infection, she will have a fever. Not only will that make her feel bad, it will also dehydrate her. Make sure she is drinking lots of water. And remember that leafy greens are mostly water and also help with hydrations (also remember that greens should be used in moderation to avoid GI issues).
Also, if you could put your location in your profile.....it will allow us to help you even more. That is especially helpful in dealing with conditions that might be regional or even climate related to a certain area. And I have contacts all over..including vets...and if any forum members live in your area, they can be a huge benefit for contacts like vets, hay and other supplies.
Randy
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