The male muzzle is straight (see head, previous picture - Arrow 4) with no bumps or sloping of the nostril (Roman nose) and should give the impression of power and strength (the same for the female muzzle). To give this impression of power it must be broad at the base producing a thick, wedge shaped triangle, tapering slightly towards the nostril.The nostrils are always broad, permitting good air passage to cool the dog off during respiration and corresponding with its broad muzzle in depth and width. In figure 1, the muzzle is of correct length and width. In figure 2, the muzzle is of correct length, but not correct in the width at the base. Many Rottweilers we see today unfortunately fall into figure 2 category. Care must be taken with breeding partners to insure the muzzle does not lengthen and become houndy or snipey. This area requires careful consideration on the part of breeders, since it is a type trait hard won, and easily lost.In figure 3, the muzzle is seen from the side presenting good depth from top of muzzle to the bottom of the lower jaw (Arrow a). If the bite shifts and becomes overshot, the lower jaw appears shallow. If undershot the lower jaw appears to protrude forward. Arrow b is the location of the masseter muscle. This muscle should have some thickness to it but not so thick as to look like the Pit bull masseter.