Animal Friend

Animal Friend is a Fallout and Fallout 3 Perk.

=Fallout=
 * Requirements: Level 9, IN 5, Outdoorsman 25%
 * Ranks: 1
 * Benefit: Animals will not attack one of their friends, unless the animal is threatened or attacked first. Exactly what an animal is in this world is open to debate.
 * Note: It has been confirmed that rats and radscorpions are classified as animals by this perk, whereas deathclaws are not.

=Fallout 3=
 * Requirements: Level 10, CH 6
 * Ranks: 2
 * Benefit: At the first rank of this perk, animals simply won’t attack. At the second rank, they will eventually come to your aid in combat, but never against another animal. This perk affects the Dog, Yao Guai, Raider Guard Dog, Mole Rat, and Brahmin.
 * This perk only applies to the animals that are listed in the description, so creatures like Radscorpions, Centaurs, and Mirelurks are unaffected.
 * Deathclaws are certainly not affected, as no one should mess with Deathclaws.
 * Bug: If you remove the perk via the console, animals may behave as if you still have the perk.

Additional Dialog

 * Tree Father Birch in Oasis explains why animals are in oasis. There appears to be no benefits.

Perk Usefullness
Animals are not everywhere, most of the though locations like downtown D.C. don't have a lot of animals. When your character gets around lvl 7-8 he or she should have NO problems wasting anything from radroach to Yao Guai. With higher levels some just run-a-way. In short: there are much better perks available.