1) How many words do we understand? According to canine researcher Stanley Coren, of the University of British Columbia in Vancouver, Canada, dogs can distinguish more than 160 words. Even, in some cases, up to 200 words. In addition, they are able to solve complex problems, with mental abilities close to that of a 2-year-old child. Three types of canine intelligence are distinguished: the instinctive, the adaptive, the work and the obedience.If that was not enough, during the game, dogs are able to deliberately deceive both dogs and humans for a reward and, according to Coren, "they have...