Each year 64 registered thoroughbred greyhounds take part in the knock-out event on Withins Field, Altcar, hoping to win the prestigious Waterloo Cup and the associated prize monies.
Beaters scare the hares onto a course and when they get 80 yards down the course two hounds are released by a qualified "Slipper" to try and catch it.
A professionally trained judge on horseback watches each dog chasing the quarry and awards points for things such as speed, agility and the way it makes the hare change direction.
Points are also awarded if a hare is killed but advocates of the sport are keen to stress the aim of the game is not to kill the quarry but to score the most points.
The dog which accrues the most points goes through to the next round until the best two dogs take each other on in the final.