Canker

This ear ailment is sometimes not noticeable externally. If your pet is shaking its head constantly or scratching at its ears, or if you notice any signs of inflammation, it should be examined for canker. For treatment, begin by wiping out the ears with hydrogen peroxide applied with a cotton tipped swab. Afterwards, dust the ear with an appropriate antibiotic. Avoid using preparations that are formulated for dogs. If you are uncertain about selecting the right medication, consult your vet.