If you look deep into history, indeed, a dog breed rottweiler were big and strong, but they are intended to help people, not for entertainment or making money. Undoubtedly, this breed is needed, simply necessary in the upbringing of a rigid arm. Note, hard, not fierce, or the most good-natured and playful dog will turn into an aggressive, unbalanced, dangerous to society animal. As in any breed, even in People have differences: good – bad, calm – nervous, patient, and not very much. And what can we say about dogs, that's why there is selection, which is responsible for the fruit was none other, as we have with you – modern breeders. In the XX-XXI centuries., Centuries development of thinking and intellectual activity of man, the superiority of reason over the centuries animal instincts, turning centuries of humanity, so much they thrive. Yes, the same 'Dogfights', 'fighting without rules' with tatalizatorom. First, people from the vicious dogs do like their relatives, aggressive, dangerous 'Defender' and then go with him to a fight, watch it and make money by fighting dogs, which at that time thought that protecting his master. Villainy – Do not you think.