dosing most certain IS needed no matter the route of ivermectin! It is a potentially very toxic drug if overdosed so please pay attention to your dosing! Oral is absobed about as well as injectably, so overdosing a rabbit orally can have just as serious of consequences as overdosing injectably. This is a very potent neurologic toxin and I have seen several cases of overdosing not go well (usually a decimal point error which leads to animals getting a dose 10x the recommended dose- often high enough to cause seizures, severe depression etc.... please do your math carefully or have a veterinarian prescribe this for you). Rabbits fortunately seem pretty tolerant of this drug at the proper doses -doses for Ivermectin are widely published so I will just repeat them here to clear the curious 'mystery' of this situation: 0.2mg/kg -0.4mg/kg once. It can be repeated in a week or two if needed (often a second dose is needed for severe cases of ear mites). The 0.2 mg/kg dose is actually the standard dose of Ivermecton for most animals (mammals, birds and reptiles)... which tells you one thing.. no one has really done the research to find out what the best dose actually is, but that this dose seems rather safe for most animals (though NOT for all- very toxic to collies and related breed dogs, bad for tortoises, bad for many species of lizard, bad for a few species of birds). Sadly most doses (esily over 95%) for exotic animals are not based on any real research but on trial and error (lots of errors sometimes) or extrapolations from a few animal studies in other species (usually dogs or large animals) or even from doses given to humans. Then doses that seem to work (or sometimes not work at all really but did not kill the patient) are published... and these doses are repeated throughout the literature and before you know it, they are written 'in stone'... sometimes if you only knew. But those of us that treat exotics animals simply have nothing else to go on other than these published 'doses'. It may turn out that rabbit ear mites can be treated effectively with much smaller doses for all I know, or that doubling the dose can be safe and more effective. But I am not the one going to experiment.