Answer: Oral antibiotics don't work well for dog ear infections because there isn't a blood supply where their infection is (the external ear canal). (1800petmeds.com)
Having someone help with dog ear cleaning you will make it easier. (topdogtips.com)
This phenomenon of dog ear problems is correlated with a dog having a depressed immune system and problematic environment in the ear. (dog-health-handbook.com)