The Fédération Cynologique Internationale gives the following description of the Rottweiler standard: 'Rottweiler breeders aim at a dog of abundant strength, black coated with clearly defined rich tan markings, whose powerful appearance does not lack nobility and which is exceptionally well suited to being a companion, service, rescue and working dog.' This breed is all about balance, endurance, proportionality, intelligence and strength. The various standards in place for the Rottweiler's physical appearance specify these characteristics. Some growers have found that Rottweilers are especially suited to move stubborn stock that simply ignore Border Collies, Kelpies, and others. Rottweilers use their bodies to physically force the stubborn animal to do its bidding if necessary.