Mastiff Competes in Dog Agility Race, Takes His Sweet Time

This mastiff is one big old puppy, a puppy that marches to the beat of his own drum. He's not beating any speed records, but giving his best. Which makes him, of course, a good boy.

A crowd favorite mastiff during the agility portion of the Rocky Mountain Cluster Dog Show at The National Western Complex in Denver, Colorado.

via YouTube

Just to give you an idea of how fast some of the other dogs can be here's a border collie doing a similar course in record time.