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Three Australian Shepherds. The Australian Shepherd descends in part from pastoral dogs brought to herd Spanish flocks in North America as early as the 1500s. [1] There is some speculation that these dogs included the Carea Leonés, a mountain sheepdog that can display the eye color and merle coat found in many contemporary Australian Shepherds. [1]
Blue merle Border Collie puppy Red merle Australian Shepherd. Merle is a genetic pattern in a dog's coat and alleles of the PMEL gene. It results in different colors and patterns and can affect any coats. The allele creates mottled patches of color in a solid or piebald coat, blue or odd-colored eyes, and can affect skin pigment as well. Two ...
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The coat has both colors but in clearly defined and separated areas; usually the top and sides are darker and lower legs and underside are the lighter color. [3] Tricolor: Consisting of three colors, usually black, tan, and white or liver, tan, and white. [3] Brindle: A mixture of black with brown, tan, or gold, usually in a "tiger stripe ...
Koda is a toy, or miniature Australian Shepherd, which are smaller than a regular Aussie. A regular Aussie weighs between 35 and 70 pounds while a mini weighs 30 and 50 and is shorter. Aussies are ...
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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.
The melanistic mask is caused by the M264V allele (known as E M) at the melanocortin 1 receptor (MC1R) locus, also known as the extension locus. [1] [2] It is completely dominant to the other alleles of the gene, and causes the melanocyte-stimulating hormone to bind to and activate melanocortin 1 receptors (located on melanocytes) in the mask's area, causing those melanocytes to produce ...