Cerberus

The Cerberus (development code: "MA-39") was a B.O.W. series developed in Umbrella labs, such as the Arklay Laboratory, from a doberman pinschers infected with the Tyrant virus. They should not be confused with "zombie dogs", which encompasses all dog breeds infected with the t-Virus in the secondary form.

Information
Although suffering from a similar necrosis to humans infected by the t-Virus, cerberuses retain much of their former agility, with a noticeable increase in durability and aggression. In most cases, potential prey should listen for the sound of padding paws as a clue to their presence, with a growling warning that a Cerberus has become aware of the player and is preparing to attack. They will let out a pained yelp when killed.

Following the deliberate outbreak of t-Virus caused by Dr. James Marcus, a pack of cerberuses escaped into the Raccoon Forest surrounding the facility, attacking and feeding on hikers and anyone else wandering too deep into the woods. It was these attacks (as well as those committed by at least one band of roaming zombies) which eventually led to the formal investigation of the area by the police department's Special Tactics And Rescue Service in July 1998. However, some of the S.T.A.R.S. members were overwhelmed and killed by them. The first of which was Edward Dewey, who attempted to take refuge in the Ecliptic Express before succumbing to the t-Virus. RPD pilot Kevin Dooley was also killed by them, possibly because he could not escape his helicopter in time. Joseph Frost and the rest of S.T.A.R.S. Alpha Team encountered more cerberuses outside of the Spencer Mansion, where they were quickly overwhelmed and forced to flee to the Mansion. Joseph was killed and partially devoured by them.

Resident Evil: The Deck Building Game
Cerberuses are basic Infected cards in the Resident Evil DBG. They have 25 Health and can deal 10 Damage to Exploring players. They have no special effects and are worth 2 Decorations.

Trivia

 * This creature was named after Ceberus, the mythological guardian of the Greek underworld, a gigantic dog with three heads and a collar made of poisonous snakes.
 * Attempting to leave the mansion in the original Resident Evil, Director's Cut, REmake and Deadly Silence versions triggers a cutscene where the door is opened and a cerberus sticks its head in and attacks. After that, the message "It's too dangerous to go out." is displayed.
 * Only four of the cerberuses appear in Resident Evil Zero.
 * The Cerberus is the only enemy whose head will be destroyed when attacked by the Rocket Launcher (resident evil remake).
 * Barry Burton is implied to have been killed by them in Chris' scenario.
 * Cerberuses will only attack when the player walks into them or runs anywhere in the room. Walking past them will not make them attack unless you are attacked by something else to trigger a reaction.
 * In the Inserted Evil ARG, an unlockable document describes electrical experiments conducted on a Cerberus within the mansion.

Gallery
Cerberus MA-39 ケルベロス