Miss Piggy from The Muppets is the almost certain origin point for most pets named Piggy — the glamorous, karate-chopping diva who refuses to be underestimated. As a pet name it has a long and cheerful tradition of owners applying it to dogs and cats who are either genuinely food-motivated or carry themselves with an air of self-importance.
The Miss Piggy Legacy
Jim Henson's creation, debuted in 1976, remains one of the most fully realized comic characters in American entertainment: ambitious, vain, devoted, and genuinely funny. A female dog named Piggy is almost certainly a tribute. The irony of applying the name to a beautiful, well-groomed pet (or alternatively to an absolute chaos gremlin) works in both directions.
The Food-Motivation Reading
Piggy is also one of the most direct "this dog eats everything" names in the registry. Owners of particularly enthusiastic eaters, including Beagles, Labs, and French Bulldogs, sometimes land on Piggy as a loving acknowledgment of the defining personality trait. It's affectionate, not unkind.
The Counter-Reading: Sticks Forever
Unlike some funny names that fade into the background, Piggy stays present. Every vet visit, every introduction, the name does a thing. Most owners find that delightful. Owners who later want something more dignified have no easy exit.