Wolves are related to dogs. Their scientific classification is Canis Lupus.
They are similar in many ways to dogs, except that in most cases, they are larger.
Wolves generally have longer legs than dogs. Dogs are in fact related to wolves.
It is estimated that wolves were first domesticated about 12,000 years ago.
A lot of time has taken place since, allowing plenty of variation.
It is difficult to imagine, but everything from a Pug, to a Pitbull, to a Chihuaua came from the wolf.