Ravenous Hunger

 is a perk in the Fallout: New Vegas add-on Dead Money, gained by having Dog as a follower.

Effects
When a Ghost Person in knocked unconscious, Dog will consume then, preventing them from regaining consciousness. This is very helpful during the quest "Fires in the Sky", and before Dog teaches you how to properly kill them.

Trivia

 * The name of this perk may be a reference to the Ravenous Hunger creature in the Oblivion add-on Shivering Isles.