Dogs that pull weights! Look how incredible that these trains Pit Bull Terrier! Recently there is a sport that is raging among animal lovers. This sport comes from the version of the shipping dogs are used to move goods in mountain towns. Such conquests is not seen well by the animal loving organizations who vehemently rejected this sport. The rules are very simple. The dog is attached to the sled with a harness that gives maximum protection, no unfortunate event has not been signaled when organizing such competitions. Lovers of this sport were organized in associations and plan to promote the sport on all continents. Countries such as England, Puerto Rico, Mexico, Ireland, the Philippines and America have already agreed on the organization of such events on their territory.