The ''The Mongrel'' is the first summon that the [[Witch Doctor]] gets.

This summon was first seen in the [[Gameplay Trailer]] where fans were told that it could be enhanced with the Witch Doctors offensive spells to do additional damage. The Player then demonstrates this by blasting the Mongrel summon with a [[Locust Swarm]]. This buff makes the Mongrel's appearance change to be covered in a green goo as well as cause additional damage with it's regular attack. Later in the same video the female witch doctor is seen hitting her mongrel with a [[Skull of Flame]] (although it was called "Fire Bomb" at the time of the trailer) causing it to look fiery and, presumably, do fire damage.

There is also a [[Sacrifice]] spell in the Witch Doctor's arsenal with causes the Mongrel to explode and cause damage to any all nearby enemies.

As many as 4 mongrels Mongrels are seen in screen shots and in the gameplay video for a single witch doctorWitch Woctor, although it is not known what the limits are, in fact most of the mechanics are not known for sure.