Bull Mastweiler

The Bullmastiff is a large, powerful breed that combines the strength of the Mastiff with the athleticism of the Bulldog, reflecting its heritage as approximately 60 percent Mastiff and 40 percent Bulldog. Males stand 25 to 27 inches at the shoulder and weigh 110 to 130 pounds, while females measure 24 to 26 inches and weigh 100 to 120 pounds. The breed possesses a compact, substantial build with significant bone structure and well-developed musculature that creates an impression of tremendous strength without appearing cumbersome or awkward. The overall silhouette should convey a nearly square appearance when viewed from the side. The head is large and square with a broad skull that displays moderate wrinkling when the dog is alert or interested in something. The muzzle is broad and deep, approximately one-third the length of the entire head, with a moderate stop and slight underjaw. Dark, medium-sized eyes convey an alert, intelligent expression that reflects the breed's keen awareness, and V-shaped ears of moderate size are set high and wide, folding close to the cheeks when relaxed. The neck is powerful, well-muscled, and moderately long, blending smoothly into well-laid-back shoulders that contribute to the breed's powerful movement. The coat is short, dense, and close-lying, providing effective weather protection while requiring minimal grooming to maintain its neat appearance. Standard colors include fawn, red, and brindle, with fawn ranging from light tan to deep reddish-brown, and brindle displaying black striping over the base color. A black mask is essential to the breed's expression, extending up toward the eyes and providing distinctive contrast against the body color. Small white markings on the chest are permissible but not preferred. The back is short and level, with a deep, broad chest and well-sprung ribs creating a powerful torso. The tail is set high, thick at the root, and tapers to the hocks, carried straight or curved but never hound-like in carriage.

The Rottweiler is a medium-large, robust working dog that projects power, agility, and endurance through its compact, substantial build. Males stand 24 to 27 inches at the shoulder and typically weigh 95 to 135 pounds, while females measure 22 to 25 inches and weigh 80 to 100 pounds. The breed standard emphasizes that the ideal proportions show a height-to-length ratio of approximately 9 to 10, creating a nearly square outline. The body exhibits tremendous bone and muscle mass balanced to create an impression of compact power without appearing coarse or cumbersome. The broad, moderately arched head is a distinctive feature of the breed, with a well-developed zygomatic arch and strong upper and lower jaws. The muzzle is broad and straight, neither too long nor too short relative to the skull. Medium-sized, almond-shaped eyes are dark brown and convey an alert, intelligent expression. Ears are triangular, medium-sized, and pendant, hanging close to the head and set well apart to add to the appearance of a broad skull. The powerful neck is well-muscled, moderately long, and slightly arched without loose skin. The coat is a defining characteristic, consisting of a medium-length outer coat that is straight, coarse, dense, and lies flat against the body, with an undercoat that varies in thickness depending on climate. The only acceptable coloration is black with clearly defined rust-to-mahogany markings located in specific areas: spots over each eye, on cheeks, as strips on both sides of the muzzle, on the throat, on the chest as two triangular marks, on forelegs from carpus to toes, on inside of rear legs, and under the tail. The back is firm and level, the chest is deep and broad, and the loin is short and deep. The tail is docked short in countries where this is permitted, or naturally long and carried in line with the back when moving.