Ear problems are relatively common in dogs and puppies. Dogs are prone to ear mites, ear infections and allergies, and by cleaning their ears regularly, you can help prevent these. The necessity to clean your dog's ears depends largely on it's breed. Dogs with hairy ears, large pendulous ears, or a history of ear infection often require regular ear cleaning. Once infection of the outer ear occurs (otitis externa), ear cleaning products are rarely enough to cure the problem. Signs of infection are yellow or black discharge, offensive odour, excessive head shaking and scratching at the ear(s). If this occurs, seek veterinary attention ASAP. Having a bottle of Ilium Ear Drops on hand, and using this in the first instance of infection, is your best chance of curing the infection without needing to see the vet and avoid prescription of antibiotics / antifungals.