Dogs with floppy and active lifestyle are more prone to ear infections than other breeds of poor air circulation and moisture trap. Popular domestic dog breeds such as Bigl, Cocker -Spaniels and Labradors often suffer from itching, painful ears caused by bacteria, yeast or allergy. Symptoms include shaking, redness, odor or discharge. Cleaning your dog’s ears regularly and drying them after swimming or baths can help prevent infection. In the case of ear infection, treatment is necessary with the help of a drug intended for a veterinarian. Chronic infections can lead to hearing loss unless you are ultimately treated.