I was going to mention the Airbus A320 phenomenon. I have heard it many times and know what causes it, but it's still remarkable just how much it does sound like a barking dog. Actually, a wind-up dog, because it eventually slows down and then stops.
I don't know what a "Vertical Modular Washer" is. A stacking toploader maybe? If it's a GE, their machines used to make a "sawing" sound when new, which some may perceive as "barking" instead. IIRC, the HE toploaders made by GE also make a similar noise, but in a much slower rhythm.