Natural. Barking is common to pups in the wild but most adult wild dogs will be silent, except for growling or yelping.
The only "wild dog" you can find in Australia is the dingo. Even then, dingoes do bark. The only known dog not to bark is the Basenji, which is not Australian.
The Basenji breed of dog does not bark. They are the only dog breed that doesn't bark.
Unless trained to do otherwise, dogs will usually bark at wild animals. This occurs when they cannot get physically close enough to examine it, or when they confront it.
Depends what type of dog it is. The Basenji is the only dog that can not bark it can howl but not growl or bark. They like to call it the barkless dog, but if you watch it howl most people will get comfused and call it a bark.
Basenji.
you bark
A tree. :L
A Basenji hound
Wolves cannot bark. They can howl, they can whine or growl, but they cannot bark as a domestic dog does. Wolves can, in fact, sleep indoors.
depends on the dog, African Wild dogs are said to squeak or chirrup
Yes. A dog can bark with a bone in it's mouth. Because the mouth is already open, it just has to work the vocal chords.
The basenji is the only dog that can not bark.