If you like your dogs on the larger size, however, then this list of big dog breeds that make sensible pets is sure to pique your interest. It’s just a shame they have a shorter-than-average lifespan.

They might be tall in the dog world, but they're one of the most mellow, patient, and friendly. Scooby-Doo was a Great Dane, by the way, and the breed does match that clumsy, lovable energy.

While no dog is truly 100% hypoallergenic, several large dog breeds come close. These breeds often produce less pet dander and shed very little loose fur, making them ideal for allergy sufferers.

Big dogs often get a bad rap just for their size, but don't let the bulk fool you. Behind those massive frames are hearts made of marshmallows. These dogs may look like security systems on legs ...