Heavy Horses 2012 Calendar. This Heavy Horses 2012 calendar Heavy features illustrations of Horses which are from a specific family of Horses, which include the Percheron, the Brabant, the Shire and the Suffolk Punch. These heavy horses are well known for their strength and have been used for centuries in farming as well as building industries and assisting some transportation – such as barges. Although many uses are no long consigned to the history book - modern motor vehicle engines are still rated in terms of horsepower! This Heavy Horses 2012 Calendar features 12 stunning illustrations of these heavy horse breeds!