Chihuahuas rank as the smallest dog breed. They also have one of the longest lifespans. While it's great that your chi will be with you for a long time, that lengthy lifespan presents some problems you'll need to watch for.
Border Collies rank as the smartest dog breed. They're also incredibly active, requiring daily tasks and large farms or yards to run around on. And failing to engage their minds or activity needs, you could find yourself confronting the low end of the Border Collie lifespan.
Who doesn't love a giant fluffy dog? Berners have a reputation for loyalty and strength. With the ability to draft - pulling carts several times their weight - they seem nearly invincible. So why is the Bernese Mountain Dog lifespan so shockingly short? Before you bring one into your home, make sure you understand what you're taking on.
The average pug lifespan is similar to other dogs their size. However, they have a higher risk of health problems. With concerns related to being a brachycephalic breed, eye problems, neurologic diseases, and possible orthopedic problems, Pugs present a real challenge for their owners.