Diversity There is diversity within the dog/wolf groups: They vary in size from lbs up to 250 lbs Some have no hair and some have LOTS of hair They come in many different colors They are known for their loyalty (even wolves are extremely loyal and mate for life) There are over 200 different dog breeds(3) and three main types of wolves.(4) They have different personality traits and behaviors based on where they live and life experiences Their lifespan varies between and 20 yrs depending on the size and breed of dog