This is deemed the 'safe' or responsible way of producing merle puppies. 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. Read on to learn why you might want to think twice before purchasing a merle dog. The study examined 153 merle dogs, and found that over 8% of the study group had some form of deafness. A double dose of the merle gene can be deadly. Harlequin (“Hh”) and merle (“Mm”) are inherited separately but must work together. In certain breeds of dog, there is a coat pattern known as ‘merle’. The practice is controversial. These dogs may have poorer night vision. Double merle dogs are more likely to live with blindness and deafness. Homozygous refers to the inheritance of the same allele from both parents. Is it safe to breed them? I'm very thankful now that I did, because I imagine if the breeder had him returned, he probably would have been euthanized. Some dogs do not look to have a merle pattern but genetically are merle. Great article! This is the reflective layer at the back of the eye. True albinism is a genetic condition in which pigmentation of eyes, coat, and skin is completely absent. A dog that has very reduced merling that is nevertheless visible, such as a blue ear, isn't a cryptic merle. She is almost six months old and still hasn’t been bought. If focal, they only cause minor impairments, but complete cataracts are possible too which can cause blindness. It’s one of the most beautiful coat patterns in the dog world. Commonly merle dogs will have at least one blue eye, but in this example, due to the tan markings on the face, both eyes are brown. Important Disclaimer – This site does not intend to provide veterinary advice. Ocular defects are directly associated with the double merle coat. However, as yet there is no firm scientific evidence to imply that a dog with white ears will be deaf, or a dog with white patches around the eyes will be blind. A kennel is promotion, networking, bookkeeping, online marketing, and more. It is inherited separately from merle. Journal of Veterinary Internal Medicine 2009. 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. For a dog to have a merle coat, it requires both alleles. If your dog stays outside during the day, always provide shelter. Product availability and prices for Amazon Products displayed on this page are updated every half an hour and are subject to change. I shudder to think what would result in a double to double breeding, but since I really haven't seen the results for myself or read up Among their findings they recorded research on deafness in Dachshunds with the merle gene. My double Merle has had minimal vision since joining our family 4 years ago. In certain breeds of dog, there is a coat pattern known as 'merle'. The merle gene that makes the Dapple Doxie’s coat dapple is also responsible for higher instances of deafness, blindness, sensitivity to sunlight, and higher rates of skin cancer in the dog … A study done by Texas A&M University found that 8 out of 22 double merles were completely deaf, 2 were deaf in one ear. I know people who didn't understand and tried. Your email address will not be published. My exposé of Wyndlair Avalanche has gone viral and now the breeders who support this practice are closing ranks and covering their tracks. Texas A&M University has devised a … It is not meant to substitute for diagnosis, prognosis, treatment, prescription, or formal and individualized advice from a veterinary medical professional. Equally, there are those who mistakenly think that the issues with double merles indicate that the normal merle (Mm) dog is somehow less healthy than a standard colour. A blue merle is a black dog with the merle pattern; a red merle is a liver dog with the merle pattern. Merle X Merle This is the litter where the double merle pups show up (and we don't recommend it). In the diagrams and examples that follow (M) refers to the merle gene, while (m) refers to a non-merle gene. It also eliminates the risk of double merles (“M/M”) because only one dominant “M” allele is involved in the breeding. Some double merles have a 'starburst' pupil, where the pupil appears to have spiky projections. How do I know my dog has CD? Ideally anyone selling a merle puppy should explain to the new owner the risks associated with breeding merle to merle, especially if that person already has a merle dog of the opposite sex to the puppy. Two recessive copies result in a dog that is not merle. to be used for general knowledge only. Price and availability information shown on Amazon at the moment of purchase will apply. Harlequin is a dominant gene that occurs on its own locus, the H locus. It is sometimes referred to as a colour, but is in fact due to a gene that alters the way pigment appears in the dog's coat. Do you know what a double merle is or what it means? These patches are distributed all over the body. Our bestselling ebook helps you start and manage your dog breeding adventure from day one.
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