Forums GTA Rufus from Red Dead in GTA V?

In the stranger mission 'risk assessment' with Franklin, for players who have done it know you have to follows dog at the beginning. The dog looks a lot like Rufus, John Marston's dog and during the second cutscene, the dog disappears like a ghost. Also following the dog reminded me of following Rufus through Tall Trees in Red Dead. I'm not sure and haven't seen anything About it anywhere else so I was wondering what you guys think. Is it an Easter egg or just a random dog?