Mutant hound (Fallout 4)

Mutant hounds or FEV hounds are creatures found in the Commonwealth in 2287.

Background
These are dogs that have suffered major mutation damage. Usually they are accompanying super mutants. It is possible they were created in the FEV lab of the Institute along with the Super Mutants.

Biology
Mutant hounds are usually two times bigger than normal stray dogs. In addition, their hair has turned gray or is completely missing. The modification imposed on their bodies is similar to the one the super mutants went through when they were humans: increase of muscle mass, depigmentation of the skin to a greenish color and complete loss of body hair. The intelligence of Mutant Hounds seem affected too in the same way that a super mutant's is from the Forced Evolutionary Virus. This leads to thinking that these dogs were exposed (casually or purposely) to the FEV that spread in the Wasteland from the Mariposa Military Base. They seem not to be linked to the Master as he was evolving only humans for his army. Super Mutants seem to understand Mutant Hounds like no one in the Massachusetts Wasteland. They have developed the ability to emit a very loud howl which alerts nearby enemies.

Gameplay attributes
Mutant hounds will alert nearby mutants using a very loud howl. They deal radiation damage upon biting you. They normally come in packs of 1-3. They can also be tamed by the player if he/she has the Animal Friend perk

Appearances
Mutant hounds appear only in Fallout 4.