Does your dog have stinky ears? Ear infections are one of the most common reasons for foul doggie odor. They are often caused by allergies, bacteria or yeast overgrowth and can become a chronic problem. Other signs of dog ear infections are: head shaking, pawing at ears, goop or redness inside the ears. Contact your vet right away if your pet has ear issues. If left untreated, ear infections can cause deafness. Use K9 Yeast Defense and Power Probiotic along with treatments from your veterinarian. For more information on allergies and yeast click here.