The predatory motor activity follows a sequence: search (orient, nose/ear/eye); stalk; chase; bite (grab-bite, kill-bite); dissect; and consume. In different breeds of dogs, certain steps of these have been amplified or reduced by human-controlled
selective breeding for various purposes. The "search" aspect of the prey drive is used in
detection dogs such as
bloodhounds and
beagles. The "eye-stalk" is for
herding dogs. The "chase" is seen in sighthounds such as
Greyhounds and
lurchers, while the "grab-bite" and "kill-bite" are for the training of
terriers. In most dogs, prey drive can occur without
extrinsic reinforcement. ==Benefits==