This nickname have come to light because of the tendency which some small dog breeds have, for instance nipping at peoples ankles or chasing cyclists and attempting to bite their feet. This sign in a dog can often show a lack of discipline and training in the dog.
One of the more popular small breeds of dog is the Jack Russell. This small breed of dog has proved to be a very obedient breed of dog as well as being loyal towards their owner. As well as this they are also a very energetic dog that will often have lots of energy all day long.
Due to their small size, these breeds can often escape little gaps in spaces and are known for running fast. This can prove to be a problem, but taught from a young age, this is very controllable.
