Alopecia is the medical term meaning an abnormal absence of hair. The “X” in Alopecia X simply indicates that the veterinary community doesn’t completely understand what is going on with this condition. Dogs with Alopecia X experience gradual, symmetrical hair loss over the sides of their bodies. At first the areas are covered with a fuzzy “puppy” coat, but eventually, all the hair falls out.
No treatment is necessary since Alopecia X is a strictly a cosmetic concern, but some dogs do respond to castration, medications that suppress adrenal function, or hormone supplements.