Oooh Tulip, those markings scuh-ream blue heeler to me. The marking around the feet are totally heeler. My heeler/springer spaniel had the same markings on her lower leg, and my roommmate's heeler female threw a ton of babies with those markings. The ears though, wow whatever it is it's an interesting combo. Glad to hear you're reaping the benefits of the wicked smarts that cattle dogs have.