A. It’s hard to say what’s causing the infections. It could be vaccinosis, for instance. Obviously, the ear area is too alkaline so treating this condition could be as simple as buying a bottle of apple cider vinegar, diluting ¾ tsp. in ½ cup of water and rinsing out the ear canal. This will help to acidify the ear area. This remedy does not always work but it’s a start. Another treatment is to change the diet. Getting carbohydrates out of the diet by eliminating grains and putting your dog on a raw meat & veggies diet may be the answer.