There is no way to treat an infection without antibiotics. Do not use vinegar or alcohol in your dog's ears. It will burn his ears and cause your dog a lot of stress and pain.
Your dog needs to see a vet. Changing the diet will help too. Give your dog lamb, duck and sweet potato. Stay away from grains, chicken and beef. Most dogs are allergic to chicken and beef cause of all the stuff the farmers give them then dogs eat the meat with all the junk in it, like antibiotics, hormones, corn just to name a few.
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