Cyberdog (Fallout: New Vegas)

Cyberdog are creatures in Big MT.

Cyberdog
Only Rex appeared into regular cyberdog.

Military cyberdog
The military cyberdog has a sonic bark used as a weapon and has a chance to knock down the player with a melee attack.

Police cyberdog
Slightly weaker variety of the military cyberdog, may contain several types of small energy cells on death.