I have the heard the saying, stubborn as a mule, but I bsay that is only because they have never met a schnauzer who wants to sing, and sing, and sing, and sing for hours more.

What, you want me to stop singing? Why? Oh, its midnight and I have been singing since 4 AM in the morning? But its still so early. I could sing for twelve more hours easily.

Once they go a round or two with a stubborn schnauzer they will think that dealing with a stubborn mule is like picking daisy in comparison to dealing with a stubborn willed, as set in their desires a brick wall of a schnauzer,