Yesterday, I was out riding the 4 wheeler on the farm, and had my lab running besides me. He's a yellow lab, about 115 pounds and solid as a rock. He likes to go check out all the ground hog holes as he's running through the fields. Well, as we popped over a small hill, he see's a ground hog on the field and the chase is on. Turns out the hog came up about 5 feet short of his hole before Bull locked onto him. One shake and he was done. And like any good retriever, he brought him back to me. He's hell on possumns (sp?) too.