Dog

In the Fallout world, dogs are little different from the ones found in our world, although they have become feral and vicious in order to survive in the harsh environment of the Wasteland. Even so, just as they have in ages past, many dogs have remained faithful and beloved companions to men and women. Unarguably, the most famous of these post-nuclear canines was Dogmeat, the companion of the Vault Dweller.

Though most breeds of dogs remain largely un-mutated by radiation exposure, some modified or mutant varieties do exist. The centaurs are mutants created by mixing dog, human and brahmin DNA in FEV vats. Dogs were also subject to Enclave experiments, which resulted in cyberdogs.

Fallout Tactics
Dogs in Fallout Tactics are a common sight in the Wasteland. They are used by many factions, like the Brotherhood of Steel, raiders, and even super mutants, as loyal guardians and attacking force. There are groups of wild dogs that could be encountered in Macomb and during the travels in the Wasteland.

Fallout 3
Dogs appear in the form of raider dogs, scavenger dogs, Talon Company guard dogs, and vicious dogs. See these individual pages for statistics for dogs in Fallout 3:
 * Dogmeat (Fallout 3)
 * Raider guard dog
 * Scavenger's dog
 * Talon Company guard dog
 * Vicious dogs

Dog
Normal dogs seen in towns like Carbon. A friendly animal living with townsfolk. If the Brotherhood of Steel Initiate has a perk Man's Best Friend, he gets a dog companion, who will attack his enemies.

Raider dog
Specially trained killers, these dogs wear spiked armor and are highly aggressive.

Poison dog
These dogs are common in the city of Los which is inhabited by ghouls. High level of radiation caused them to become glowing, poisonous, radioactive beasts, like some ghouls and radscorpions. The Church of the Lost uses them as its enforcers.

Van Buren
Dogs were also going to be featured in the canceled Van Buren, taking place in American southwest.

Fallout: New Vegas
Dogs in Fallout: New Vegas appear in the form of a companion in Rex, a cybernetic dog owned by the King in Freeside, attack dogs for Caesar's Legion, and various others. See these individual pages for statistics for dogs:
 * Rex
 * Legion mongrel

Appearances
Dogs appear in all Fallout games.

Pies