Humans aren't the only ones who get comedones. In dogs, there is a syndrome called Schnauzer Comedone Syndrome, which happens most often in miniature Schnauzers, but can occur in other dogs.
The dogs get lines of comedones, both open and closed, along their spine.
This can cause crusty sores, patchy hair loss, and a strong odor.
Although the condition cannot be cured, it can be managed with special shampoos and occasionally, antibiotics.