Believe it or not, this dog was bred to be a butcher's dog, and was able to work with livestock and pull carts to the market.
But with its unmistakeable black and brown fur appearance, the Rottweiler can be one of the scariest looking dogs around.
The dog shows a natural guarding instinct to protect his home and family as part of its genetic history.
However, the strength and power of this breed can make them potentially dangerous when put into the hands of an irresponsible or confused dog owner.
Even puppies can show aggressive behavior and snarl and show teeth to their new owners in feeling out who the alpha male is.
These dogs can be dangerous and grow up to 110 pounds and have very strong legs and shoulder muscles.
If you want to talk about bite pressure, the Rottie can clamp down on something with 328 pounds per square inch pressure!