Feeding Cerberus
The Hell’s Retriever of Mob of the Dead comes back on Blood of the Dead, and it is again earned by feeding three Cerberus heads. Each one is a flaming dog head on a wall, which eats the zombies killed near it, one at a time, six for each head. When a head has eaten enough, it howls and goes back into the wall.

Eagle Plaza
On the wall of the white house right in front of the door from the Warden’s Office.
New Industries
On the back left wall of the building, near a Mystery Box spot and the GKS.
Cell Block 2nd Floor
In the middle of the cells, at the same place as in Mob of the Dead.

