Question: Of the two breeds of dogs, Miniature Schnauzer and Blue Lacy, which are regonized in three colors internationally?

Context articles: German Pinscher
Grötzsch's theorem
Edge coloring
Uncle Earl's Hog Dog Trials
Miniature Schnauzer
Blue Lacy
Giant Schnauzer
Chizer
Dutch national flag problem
Hemorrhagic gastroenteritis

The German Pinscher (original name Deutscher Pinscher, FCI No. 184) is a medium-sized breed of dog, a Pinscher type that originated in Germany.
 The breed is included in the origins of the Dobermann, the Rottweiler, the Miniature Pinscher, the Affenpinscher, the Standard Schnauzer (and, by extension, the Miniature Schnauzer and Giant Schnauzer).
 The breed is rising in numbers in the U.S., mainly due to their full acceptance to AKC in 2003.
 In Australia, the breed is established with a rise in popularity becoming evident.
In the mathematical field of graph theory, Grötzsch's theorem is the statement that every triangle-free planar graph can be colored with only three colors.
 According to the four-color theorem, every graph that can be drawn in the plane without edge crossings can have its vertices colored using at most four different colors, so that the two endpoints of every edge have different colors, but according to Grötzsch's theorem only three colors are needed for planar graphs that do not contain three mutually-adjacent vertices.
In graph theory, an edge coloring of a graph is an assignment of "colors" to the edges of the graph so that no two adjacent edges have the same color.
 For example, the figure to the right shows an edge coloring of a graph by the colors red, blue, and green.
 Edge colorings are one of several different types of graph coloring.
 The edge-coloring problem asks whether it is possible to color the edges of a given graph using at most k different colors, for a given value of k , or with the fewest possible colors.
 The minimum required number of colors for the edges of a given graph is called the chromatic index of the graph.
 For example, the edges of the graph in the illustration can be colored by three colors but cannot be colored by two colors, so the graph shown has chromatic index three.
Uncle Earl's Hog Dog Trials is an annual Hog Dog Baying Event held in the third weekend of March in Winnfield, Winn Parish, Louisiana at the Winn Parish Fair Grounds involving boars and various breeds of bay dogs, including Catahoula Leopard Dogs, Blackmouth Cur, Blue Lacy, and others.
The Miniature Schnauzer is a breed of small dog of the Schnauzer type that originated in Germany in the mid-to-late 19th century.
 Miniature Schnauzers developed from crosses between the Standard Schnauzer and one or more smaller breeds such as the Poodle and Affenpinscher, as farmers bred a small dog that was an efficient ratting dog.
 They are described as "spunky" but aloof dogs, with good guarding tendencies without some guard dogs' predisposition to bite.
 Miniature Schnauzers are recognized in three colors internationally: solid black, black and silver, and a color known as 'salt and pepper'.
 There is a controversial fourth color variant in Miniature Schnauzers, pure white, which is not recognized universally.
The Lacy Dog or Blue Lacy Dog is a breed of working dog that originated in Texas in the mid-19th century.
 The Lacy was first recognized in 2001 by the Texas Senate.
 In Senate Resolution No. 436, the 77th Legislature honored the Lacy as "a true Texas breed".
 In June 2005, Governor Rick Perry signed the legislation adopting the Blue Lacy as "the official State Dog Breed of Texas".
 As expected, the vast majority of Lacy dogs are found in Texas.
 However, as the breed becomes more well recognized, there are breeding populations being established across the United States, Canada, and most recently in Europe.
The Giant Schnauzer is a working breed of dog developed in the 17th century in Germany.
 It is the largest of the three breeds of Schnauzerthe other two breeds being the Standard Schnauzer and the Miniature Schnauzer.
 Numerous breeds were used in its development, including the black Great Dane, the Bouvier des Flandres, and the German Pinscher.
 Originally bred to assist on farms by driving livestock to market and guarding the farmer's property, the breed eventually moved into the city, where it worked guarding breweries, butchers' shops, stockyards and factories.
 It was unknown outside of Bavaria until it became popular as a military dog during World War I and World War II.
The chizer is a mixed dog breed originating in the United States of America.
 Chizers are a mix of the Chihuahua and the miniature schnauzer.
 This breed is NOT recognized by the American Kennel Club.
 The chizer has a combination of looks from both breeds of dogs, and can vary depending upon the breakdown of the breed.
 General sizes of a chizer range between 6-14 inches in height and approximately 4-15-lbs in weight.
 The chizer is a small breed dog, and works great in smaller areas, such as apartments, condos, and townhomes.
 The chizer comes in a typical variety of colours, usually grey, black, brown or white.
 This breed has a smooth, short haired coat that needs constant grooming, trimming around the eyes, ears and nose.
 They are usually low to average shedding dogs, and typically most groomers leave their facial hair to mimic a schnauzer beard.
 The ears of a chizer are medium in length and can stand erect when at attention, and their tail is usually docked.
 The chizer can have either an apple shaped head, or round head, with either a long or short snout, giving it either the appearance of a Chihuahua or Miniature Schnauzer.
 The body of the chizer is generally long and lean, with slender legs, and a square, robust back end.
 This back end tends to make the dog sturdier, and gives them surprising jumping abilities to reach great heights.
The Dutch national flag problem (DNF) is a computer science programming problem proposed by Edsger Dijkstra.
 The flag of the Netherlands consists of three colors: red, white and blue.
 Given balls of these three colors arranged randomly in a line (the actual number of balls does not matter), the task is to arrange them such that all balls of the same color are together and their collective color groups are in the correct order.
Hemorrhagic gastroenteritis (HGE) is a disease of dogs characterized by sudden vomiting and bloody diarrhea.
 The symptoms are usually severe, and HGE can be fatal if not treated.
 HGE is most common in young adult dogs of any breed, but especially small dogs such as the Toy Poodle and Miniature Schnauzer.
 It is not contagious.