Border Collie
The Border Collie is a herding dog from the United Kingdom. These dogs are intelligent, energetic, acrobatic, and athletic. They are often referred to as the smartest of dogs, or the workaholic of the dog world. In 2013 one Border Collie was tested on over 1,000 words along with basic understanding of grammar! These dogs have been bred more for abilities than looks. Some are small and would do well with a Medium PlexiDor dog door, others are larger and require a Large PlexiDor dog door.
Border Collies require daily exercise as well as mental stimulation. Deprived of this they grow bored and usually make up a chore for themselves, which might include re-shaping of furniture and shoes.
A Border Collie might start herding everything that moves, including children, bikes, and cars.
This is a fantastic companion for the right owner, but they need interaction and something to do.
The PlexiDor Large is the right size dog door for Border Collies.