This is Carl (I'll call him that for now 'till I can figure a better name for him)
Breed: Diamond Dog - Dubberman
Carl doesn't have a lot of history, besides a competitive rival to the Diamond Dogs (Rover, Fido and Spot) and a big disliker to ponies.
I thought it could be interesting to see what variations of dogs could fit the Diamond Dog theme :3
Diamond Dog Concept © MLP FiM