The appearance of the muzzle depends on what type your ambulum belongs to. Johnson’s line is characterized by a square and smoothly delineated muzzle with a well-defined stop. In the Scott line, the muzzle has a more wedge-shaped shape, while the transition from the forehead to the nose is less pronounced. At the same time, classic ambuli have a shorter muzzle (up to 30% of the skull length), in contrast to standard specimens (up to 40%). Deep folds are characteristic of Johnson’s Bulldogs. A large nose with wide nostrils is colored black or brown (the former is preferred). The dark lips fit snugly against the jaws.