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Often mistaken for a "double merle", a harlequin merle (or just harlequin), is a Great Dane that carries both the merle pattern allele and the co-dominant modifying gene for harlequin, PSMB7 (also known as H). This causes most or all of the diluted "blue" color to be replaced with white, resulting in a dog that is mostly white with black patches.
The merle gene does not normally affect the entire coat of the dog, but dilutes the color only in areas that randomly present the characteristic of the gene. Deeper colors are preferred; predominantly white coats are discouraged. Since Catahoula is a working dog, coat color is not a primary consideration. [1] [6]
The second way blue eyes can appear is when a dog has a lot of white fur on the face. Since the white areas cannot produce any pigment, pigment from the eyes and nose may be lost as well. [68] The third way is when dogs are affected by albinism. [68] A different gene, unaffected by coat color, can make the eyes blue. However, this gene is rare.
Blue eyes on Great Danes are “permitted” by the breed standard in dogs with merle patterns or harlequin coats, a stunning black and white cow-like print. Otherwise, most Danes have dark eyes ...
[4] [3] The breed is known for its unique colorations and variable coat patterns, it being said no two dogs sharing a coat. [3] The breed standard allows for blue merle, red merle, solid black or solid red, with or without white markings and with or without tan points. [6]
Tricolor can also refer to a dog whose coat is patched, usually two colors (such as black and tan) on a white background. Blue merle tricolor Shetland Sheepdog: Red merle Catahoula Leopard Dogs: Merle: Marbled coat with darker patches and spots of the specified color. Merle is referred to as "Dapple" in Dachshunds. Tuxedo Lab mix. Tuxedo Collie ...
Erect ears, short fur, black, red, black-and-tan or merle, often with some white on neck or over shoulders. (Note: the name "German Collie" is also applied to a cross between a German Shepherd and a Border Collie.) Huntaway Developed in New Zealand from a mixture of breeds, probably including some collie – but it is not of the collie type ...
It comes in a leopard or spotted pattern and may be red, blue, merle, brindle, black or another color, with white making up less than a third of the coat. The American Leopard Hound has a dense, short coat, medium-length drop ears and may have yellow, brown, or blue eyes.