Junkyard dog

Background
The Junkyard Dog can be found during a random encounter following Gene, her trainer. Gene will offer the Junkyard dog for 250 caps, but the Sole Survivor must be able to pass a Charisma check of 6 or higher.

Other interactions
If bought, the Junkyard Dog can be sent to any workshop settlement, and will count as 5 points of defense. She will also go into a Doghouse to rest just like Dogmeat (Fallout 4)

Appearances
Junkyard Dog appears only in Fallout 4.