Wounded dog

The wounded dog is a creature found in the Commonwealth. The Sole Survivor can heal the dog using a stimpak, giving the option to name the dog Mutt, Sparky, or Buttface. You cannot keep Sparky/Mutt/Buttface after you help him.

Background
Wounded dog is a random encounter where one can approach a wounded passive female (Sole Survivor refers to her as "Bitch") mongrel. Her right legs are at 0 health if checking VATS. One can interact with the mongrel and will be given the dialog prompts to ask if there is anything wrong and then a second prompt to render help will be available. Afterwards the right legs will be at full health in vats and the mongrel will walk normally. The third dialogue prompt has either asking her name or choose between the three names Mutt, Sparky or Buttface. If having to ask her name instead of picking one she will then be labeled "Mutt" afterwards. After the naming dialogue concludes Mutt will simply stay in the area until the encounter/zone resets.

Appearances
The wounded dog appears only in Fallout 4.