That's the method we used to use until we broke down and got a buck 89 knive. It;s quicker and a whole lot easier. To answer the first question, yes you just slip it over the stud on the rear of the ear, between the button and the ear itself. Give a quick tug then pop the tag off the front, or leave it there and it will usually fall off by the time the animals is a couple of feet out of the chute. I've clipped them off in the pasture while the cows are eating cubes off the ground, no muss no fuss.
> Use a hand size wire cutter and
> cut the button on the back side of
> the ear.