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Gull Dong or Pakistani Bulldog
This breed of dog originated in Pakistan where it's also known as the Bully Gull Terr, and was bred by crossing a pure Gull Terr with a Bully Kutta (or Pakistani Mastiff).
A fully grown male can weigh up to 140 pounds and stand fairly tall at 42 inches.
It goes without saying that these dogs are very strong-willed and can be very aggressive.
This is not the ideal breed of dog to have as a family pet, and is more suited to a life on a farm or in a forrest somewhere. They're known for having a fierce and grumpy nature.
The dog is very popular in Pakistan, but is very rare throughout the rest of the world.