I have an Australian Cattle dog, Scout, that has probably got more Dingo in him than most. I've never had a more loyal companion and he is excellant on the trail. This is probably one of the toughest breeds for enduring long treks over difficult terrain. They were bred to keep cattle moving across long stretches of the Austrailian outback. They need an incredible amount of exercise to work off their energy. I can't imagine how you would train this breed not to bark. Scout's bark has probably cost me a bit of hearing loss over the years. He's not a dog that will bark out of boredom but mainly to get my attention or in his excitement to greet me. The vet had offered to do some sort of surgery on his vocal cords but I would never consider doing such a thing to one of my animals. It is possible that someone had this done to yours. They are definitely not a quiet breed!