Ear problems could manifest in the following ways: scratching and shaking the head, bad odor in one or both ears, colored discharges ranging from black and waxy to green or yellow, inflamed and swollen ear flap, tilting of the head, and hearing loss. (muddy-paws.org)
Itchy ears, scratching, shaking, and sometimes swollen ears are a common problem for dogs and cats, too. (thesprucepets.com)
And a German shepherd with a bloody swollen ear, limply hanging, and a gash across her bleeding nose.» (thedodo.com)