2006 Calendar - Mastiffs - 12" x 12" - The Mastiff, also known as the Old English Mastiff, is a gentle, loyal companion. This laid-back, dignified dog bonds immediately with people and enjoys attention. One of the heaviest dog breeds, a male Mastiff can weigh more than 200 pounds. To keep their giant bodies healthy, they require lots of exercise. Mastiff lovers will enjoy this beautifully photographed 2006 wall calendar.