Attack Dog

Attack Dog is a perk in Fallout 4.

Effects
If you have any dog companion, it will occasionally hold on to an enemy, allowing you to shoot the debilitated enemy.

Bugs

 * Dogmeat appears to occasionally hold onto/knock down enemies even without this perk, though a VATS bonus may not apply without the perk. (It is just normal combat animation like when Curie tackles oponent.)