You can usually determine if your dog has an ear infection just by smelling the inside of the ear. If it smells foul, it is not good news. Also you can use a Q-tip to clean the inside of the ear canal to inspect it. The vet will give you an ear wash solution to apply several times a day and, after cleaning and drying, an ointment to apply inside the ear canal. The usual cause of dog ear infections is dampness and hair inside the ear canal. Best to dry the inside of the ear after bathing and remove the inside hairs with a tweezer.
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