Why is early training to moderate barking essential for an Australian Terrier owner?

Answer

They are naturally alert watchdogs who quickly voice their opinion about unusual sounds.

They make excellent watchdogs because they are naturally alert and observant; they tend to notice strangers or unusual sounds quickly and are not shy about voicing their opinion.

Why is early training to moderate barking essential for an Australian Terrier owner?
AustraliaDogcharacteristicbreedTerrier