The Yorkie is said to be a dog that often yaps, but if we look biologically at him, he is equal to any other dog. What can we do to make him understand that there is no reason to start yapping, that he just doesn't start yapping? However it's undisputed that such a behaviour can be hereditary – in the technical language of dog holders we call such a dog 'an animal with a »slack throat«. But also the opposite can appear, there do exist dogs that almost don't bark...

Read more about that in the YTJ 39.