|The following is based on information from Van Buren design documents and is not canon.|
Tell the Hangdogs About the Denver Dogs was going to be a quest in Van Buren, the canceled Fallout 3 by Black Isle Studios. It is located in Denver.
Once you know about the dogs and how the Salvagers don't want them, you can tell the Hangdogs to come get some dogs and arrange for the salvagers to leave the Hangdogs alone.
See Bares His Teeth for the task description strings for this quest.
Character type completion breakdown
Diplo Boy - Is best at negotiating stuff to favor one side or the other.