Border collies were originally bred in the north of England to herd livestock, and are considered to be one of the most intelligent dog breeds around. They require a huge amount of mental stimulation as well as simply loads of exercise - your average collie can easily go for a ten-mile walk, then still want to play when he gets home.
There's no doubt about it, these high energy beauties just love to be on the go! Added to that, they're quick, agile, loyal and just gorgeous to look at. Check out the gallery below to see some examples of our furry favorites.