Rey

 is one of Old Lady Gibson's dogs living in the Mojave Wasteland in 2281.

Background
He lives with Old Lady Gibson at Gibson Scrapyard. She will ask for 700 caps for this "favor" as he's like one of her family. She says he's getting old and he would probably need putting down soon anyway. You can kill him for free with Barter (70) check. After you kill him, you can use his brain for Rex. Using Rey's brain on Rex will increase Rex's ferocity in battle.

Appearances
appears in Fallout: New Vegas.