Pam Roblyer answered 4/14/2009 Why Does My Chihuahua's Ears Stink. They Also Drain Clear Fluid. I Have Treated For Ear Mites, But This Problem Still Occurs. My Puppy Is 3.5 Months Old. He Also Often Shakes His Head And Scratches His Ears.? Sounds like infection in ears. Go to vet for medicine.