the frustrating part now is you do not know if it was the antibiotic shot or your dog had a reaction to rabies vaccine
this is why doing too much at once is never a good idea as you cannot narrow down where the problem is - my dog has had two ear infections and only have been prescribed ear ointment -- are your dogs ears red and inflamed? were they plucked by the groomer recently? I am against plucking as the only two times my yorky had an ear infection was after plucking