Every morning, without fail, my beloved border collie Abigail and I walk a well-established pattern through my neighborhood. I use the time to think about the reading I did that morning, and Abigail trots her energy away with 42 minutes of brisk walking, on average. Just past half way, a long-coated Chihuahua I call Tippy attacks a chain link fence as we walk by and barks and snarls like a 200 pound killer. In the recording offered below, I slow his snarl and dissect the series of barks, snorts and growls that makeup Tippy’s aural persona …