Sentences with phrase «merle pattern»

While blue can occur on other coat patterns, only blue eyes on merle pattern coats are show quality.

The recent appearance of merle patterned APBTs and a couple breeders specializing in the «new» and «rare» color pattern has stirred up a controversy in the APBT community.

This cuts out one reason for producing double merles - perfect merle patterning in second generation litters - as these puppies can not be recognised and thus not shown.

Retrotransposon insertion in Silv is responsible for merle patterning of the domestic dog.

Permissible Aussie colors include a blue, red or black merle pattern, giving the coat a dappled look.

The precursor of all the breed standards we use today was established in the late 1970s, establishing black or liver, with or without merle patterning and with or without white and / or tan trim as acceptable colors for the breed.

Australian Cattle Dog - The AKC breed standard calls for dark brown eyes, however blue eyes can occur with certain merle patterns.

Other breeders believe a mating involving a double merle will produce the best merle pattern on all the puppies and so choose to produce or use a double merle in the aim to get the best «show quality» dog.

Because the Merle gene is dominant over other color genes breeding a Merle parent with a non Merle parent will statically guarantee at least one puppy in a little of four or more will be born with a Merle patterned coat.

One of the other issues with the merle pattern is whether it is a natural genetic mutation in the breed or whether it has appeared in Chihuahuas due to modern — secretive — crossbreeding with other breeds.

This provides a logical genetic indicator and explains why it is likely that certain dilute or patterned dogs, such as extreme piebalds, or other types of homozygous dilutes common in the APBT, as well as those that may be carrying the Merle pattern are prone to psychological, neurological and / or immunological problems found in other breeds that carry these alleles.

The merle pattern can occur in dogs of all coat colors.

The UKC American pit bull terrier standard accepts all coat colors and patterns with the exception of the merle pattern.

Specific sizes of the M Allele have been associated with the potential to produce «classic» merle patterning or other M - associated coat color variations.

The harlequin coat color is only expressed if the dog is also M / M or M / m at the M (merle) coat color locus which causes the dilute regions of the merle pattern to become white.

A 2006 paper on the merle gene first published by the National Academy of Sciences of the United States of America attempted to identify the gene in dogs that caused the merle pattern.

They come in many different colors, including blue, black, black and white spotted, merle pattern, harlequin pattern, silver, fawn, brindle, and tan with black.

Small studies of other breeds that can have the merle pattern found that they all had the mutated Silv gene.

The same study found that in Shetland Sheepdogs a mutation of the pigmentation gene known as Silver (or Silv) is probably responsible for the merle pattern.

These are known as «cryptic merles», but the exact reason why such dogs do not display the merle pattern remains unknown.

The merle gene causes the coat hair to produce a faded, or shaded colour (hence the merle pattern), two merle genes together often cause the coat to be white or with limited merle shading.

In the US, where double merles can be registered (though they are not termed double merles), top show kennels are deliberately producing and breeding from (MM) dogs to get the merle pattern they want.

They consider the merle pattern an indication of weakness, casting aspersions on otherwise healthy dogs.

It is thought this may be due to the way the Silv gene (the gene that causes the merle pattern) affects the pigment of the skin around or within the ear, and the colour of the eyes.

Merle pattern can be linked to health problems in Collies, Shetland Sheepdogs, Great Danes, and Dachshunds, including deafness and blindness.

The merle pattern, which causes the coat to be mottled with patches of color, is not permissible for the show ring.

Eyes can be any color, and some dogs have two different colored eyes (usually found in Merle patterns).

A double merle, sometimes called a «lethal white», is a dog who was bred from two dogs with a merle patterned coat (see photo), such as some Australian Shepherds.

Due to the amount of colors and patterns occurring in the Chihuahua breed the ethical breeding of the merle pattern can be much more difficult than in other breeds who limit the allowed colors and patterns.