Some dogs have food allergies, usually to grains (which can be the major part of Kibble) and even to some or most animal proteins - go figure on that one, dogs descend to us from wolfs that ear mostly animal protein.
There can be other environmental factors. Allergies can be hard to specifically identify. When feeding Kibble I always use grain free or at least elimination of corn and wheat. Look on "dogfoodadvisor" for a listing/rating of dog foods You'll find there the Tractor Supply house brand 4Health is highly rated and is medium to lower cost. You don't have to spend a fortune to get good dog food, the super market shelves are full of not-so-good dog food in my experience.
Yeast infection will result in lost of fur, itch, licking biting the infected areas, and a smell - ears are one area where yeast likes to form. There are prescription meds and over-the-counter shampoos for dogs containing keteconazole, the best way to treat yeast, and can be used as a maintenance deterrent, so you can use the shampoo even if not immediately needed. I have sound this type shampoo in Walmart available without a prescription.
Good luck and tell us more about the symptoms, breed and age.
Copyright 1994-2018MedHelp.All rights reserved. MedHelp is a division of Vitals Consumer Services, LLC.
The Content on this Site is presented in a summary fashion, and is intended to be used for educational and entertainment purposes only. It is not intended to be and should not be interpreted as medical advice or a diagnosis of any health or fitness problem, condition or disease; or a recommendation for a specific test, doctor, care provider, procedure, treatment plan, product, or course of action. MedHelp is not a medical or healthcare provider and your use of this Site does not create a doctor / patient relationship. We disclaim all responsibility for the professional qualifications and licensing of, and services provided by, any physician or other health providers posting on or otherwise referred to on this Site and/or any Third Party Site. Never disregard the medical advice of your physician or health professional, or delay in seeking such advice, because of something you read on this Site. We offer this Site AS IS and without any warranties. By using this Site you agree to the following Terms and Conditions. If you think you may have a medical emergency, call your physician or 911 immediately.