Was hearing a barking type of a howl coming from my backyard that was driving my dogs nuts. Thought it might be a coyote so I didn't let my pups out even in the fenced yard. I recorded it and did a little Youtube research. Apparently it is a warning bark of a fox to alert their pups or other foxes of danger. Thankfully not a coyote. I couldn't attach my home video for some reason (technologically challenged), but the first barks you hear in this video is exactly what I heard.