Here's why:
* Foxes primarily use a high-pitched yelp or bark. They may also make hissing, snarling, and screeching sounds.
* Dogs howl in a much lower pitch, and their howls are often prolonged.
While there are similarities in the sounds, a fox's howl is more akin to a short, sharp bark or a bird-like cry, rather than the full-bodied howl of a dog.