pitbull
that is easy dog owners are responsible for their dogs and they have to look after their dogs
Any dog breed can turn on their owner.
Most dogs are trained in some way, even if it's just training them to not urinate on your carpet. So most dog owners train their dog in some form.
The most common dog is an Alaskan Malamute.
The most common name for a dog is "Max"
Scottish collie or labrador The most common type of dog in the world would be the mixed breed, the mutt. They are on every continent that man is on. They can live on their own. They can turn feral if they need to.
Pit-bulls are the most common type of dog, in dog fights.
Jesse is a Jack Russell that has been called the most helpful dog in the world. His owners have trained him using a clicker, and treats. Jesse can pick up trash, fetch the newspaper, make the bed, turn on lights, take off shoes, and many other household chores with his owners.
They're just playing most likely.
A Labrador Retriever is the most common dog to have as a pet. ^-^
Since the most common representation of dogs in America is "mutt", the most common lineage of shelter residents is "mutt" also (it is a rarity for a purebred dog of any type to turn up in a shelter). Mutts are not to be disdained. They tend to be the smartest, healthiest and longest-lived of dogs.
The most common species of dog as a pet is a labrador retreiver.