6. Russian Husky

A Siberian Husky may look like a cute stuffed animal when it is a puppy, but when it is an adult, it develops into a large, protective ball of energy that is almost always eager to play. These four-legged friends are gregarious, eager to please creatures—until you rub them the wrong way. This breed belongs to the Spitz genetic family. Over time, these dogs have earned a reputation for being stubborn. They require continual training as well as a tremendous amount of attention. When there is no structure in their lives, Siberian Huskies can become wild, dangerous, and unpredictable.