Step Two: Remove the Rear Quarter
Using a slicing motion, insert your knife under the leg to the inside of the scrotum or udder and draw it toward the rear. Slice progressively deeper, making shallow half-moon cuts and working forward to the hip point where the quarter attaches to the spine; and rearward to the near side of the anus, where the blade's downward progress is stopped by the pelvic floor. When the hip joint is exposed, cut through the ligaments at its juncture to free the rear quarter. Keep following bone, feeling with your knife blade, until the rear quarter is detached.

Bonus Video Clip:
Double click the image below to start the video. Click once to stop it.