You can tell that your dog does not bark. If, while everyone else is sleeping comfortably, but then all of a sudden, their dog, barked: by it is good for everyone else, he wants to sleep with peace.
You can tell if your dog not to bark, certainly. If, while others are sleeping comfortably. But then, suddenly, they were noisy dog by barking. It is terrible for the people he wanted to sleep with tranquility.