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Schematic anatomy of the ear. In dogs, the ear canal has a "L" shape, with the vertical canal (first half) and the horizontal canal (deeper half, ending with the eardrum) The frequency range of dog hearing is between 16–40 Hz (compared to 20–70 Hz for humans) and up to 45–60 kHz (compared to 13–20 kHz for humans), which means that dogs ...
The principal registry for Border Collies in the United States is the American Border Collie Association (ABCA), which is dedicated to the preservation of the traditional working dog. [40] The breed was also recognised in 1995 by the American Kennel Club (AKC) after occupying the AKC's Miscellaneous Class for over 50 years.
A group of Labradoodle assistance dogs. This is a list of common dog crossbreeds.These are crossbreed dogs created deliberately by crossing two purebred dogs.Some are known as designer dogs and are bred as companion dogs, often given portmanteau names derived from those of the parent breeds; others are bred to combine specific working qualities inherent in the parent breeds.
Selection of different dog breeds. This list of dog breeds includes both extant and extinct dog breeds, varieties and types.A research article on dog genomics published in Science/AAAS defines modern dog breeds as "a recent invention defined by conformation to a physical ideal and purity of lineage".
Black and white Border Collie: Blenheim (Red-brown and white) Cavalier King Charles Spaniel: Piebald or pied (also called bicolor, tricolor, Irish spotted, Flashy, Patched, Tuxedo): any color or pattern coupled with white spotting. This can range anywhere from white toes and tail tip to a mostly white dog with color around the base of the ears ...
A different gene, unaffected by coat color, can make the eyes blue. However, this gene is rare. It occurs occasionally in Border Collies and similar breeds, but is mostly seen in Siberian Huskies, which may have one or both eyes blue, regardless of their predominant coat color. [68]
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