1 If the smelly ear is due to ear mites you need to clean the thick accumulated ear wax. You can do so using 0.1% ivermectin, which kills the mites.  The water retained in your dogâs ears after swimming or bathing can be a source of bacteria and yeast infections.
And treatment is simple. Most yeast infections are caused by a type of yeast called Candida albicans. A healthy vagina has many bacteria and a small number of yeast cells. The most common bacteria, Lactobacillus acidophilus, help keep other organisms-like the yeast-under control.
Candida infection, or candidiasis, is a fungal infection that can be caused by an overgrowth of one of 20 naturally occurring species of yeast. Candidiasis commonly occurs in the mouth, known as thrush, or it can affect the vagina, known as a yeast infection.