Summary: . Dogs such as terriers, hounds and those found in the northern parts of the world are tough to train because of their independent nature. Sporting and herding dogs are easier to train. Exercise requirement Some dogs are lethargic and others are very energetic. Active families would be happier with a pet that can jog, hike, and play ball. Airedales, German Shepherds, and
Image Dimensions: 104 x 130
Image originally found here.