Yeast naturally lives in small numbers inside a healthy dog's ear, but it flourishes in dark, warm, humid spaces. Floppy eared breeds, Cockers, Bassets, Spaniels, Labs, trap moisture and limit airflow, and even leftover bathwater or a humid stretch of weather can tip the balance toward overgrowth. When moisture lingers, the ear stops being a balanced micro environment. Change the environment inside and out, and you change the balance.
Sodium Caprylate, 115 mg (yielding 100 mg caprylic acid): Works from the inside to support a normal, balanced yeast level so a warm, damp ear is less likely to become an overgrowth friendly environment.