Dogs have been domesticated for a very long time now, and understandably more responsive to domesticating techniques than wolves. Dogs respond to the voice; wolves to hand signals. The dog has lost its hunting ability because of domestication.
The wolf is a natural hunter. Wolf teeth are designed for hunting. Wolves have stronger molars than dogs, enabling them to crush large bones. Wolves could prey on little children. Dogs, on the other hand, are very friendly and playful towards children. Feral dogs have been known to kill small children and attack adults.