An excess of grain and / or sugar in the diet is one of the most common causes of ear infections in dogs. (dogsnaturallymagazine.com)
They are a common cause of ear infection in cats, uncommon in adult dogs, but common in puppies under 6 months of age. (dogchatforum.com)
But did you know that exposure to tobacco smoke or even high levels of air pollution can increase the risk of ear infection in small children? (wehavekids.com)