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 opponents.)
 * This perk combined with Lone Wanderer allow you to receive both bonuses on the vanilla (unpatched) version of the games. Patched version of the game stop this from happening. Another way to enable this is via console commands flipping the tag that turns it from off to on via PC.