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Showing posts with the label inbreeding depression

What can Maine Coon breeders do to minimize inherited diseases?

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Maine Coon breeders can take several steps to minimise the incidence of inherited diseases such as hypertrophic cardiomyopathy (HCM), hip dysplasia and spinal muscular atrophy (SMA). In my view, the quality of a Maine Coon cat breeder depends on how energetically they adopt the following strategies which I don't claim is a complete list. As a purchaser of a Maine Coon kitten I'd ask some pertinent questions when meeting the breeder as to how they deal with these aspects of their operation. Genetic testing: the competent and committed Maine Coon breeder will engage in genetic testing. They will in fact prioritise it to identify carriers of specific diseases. They want to know if there foundation cats are free of inherited diseases. If they carry the genetic mutations which create these diseases. And there are DNA tests available for the three diseases mentioned above. These are the major inherited diseases. Breeders will select breeding pairs that are free from these genetic mu...

Maine Coons are popular because purchasers ignore health and are captivated by their appearance

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This is a slightly black, depressing article but the idea came to me a moment ago. The reason why the Maine Coon cat breed is in the top three most popular cat breeds in America and perhaps around the world is because the people who buy Maine Coon kittens from breeders are enamoured of the breed's appearance while apparently ignoring an aspect of this breed which is more important namely their health. And their health is not good. You might argue that this breed's health is dire. You might argue that it's shameful that such a handsome cat breed with such a fantastic history has been brought low through irresponsible and unethical breeding. I don't need to remind you about the health of this cat. But I will just touch on a few points. If you want to look into the health of this breed more, I would ask you to use the search facility at the top of the page. Or if you like click on this link because that will take you to the majority the articles about Maine Coon cat healt...

Relative birth weight (to mother's) is lower in Maine Coons compared to smaller breeds

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This is a very short note on an interesting topic as it concerns the weight of the Maine Coon which is important to Maine Coon afficionados. Although Maine Coon kittens have a birth weight which is higher than that of other breeds e.g., Maine Coon kittens 115 grams, Norwegian Forest Cat kittens 106 grams, Birman kittens 97 grams, Siamese kittens 92 grams and Persian kittens at 82 grams, the weight of Maine Coon kittens relative to their mother's weight tended to be lower than for the other breeds mentioned. Lithuanian Maine Coon kitten. Image: the breeder. For instance, Maine Coon kittens' weight relative to their mother's weight was 2.3% in this study. For the Norwegian Forest Cat kittens, the percentage was 2,7%, Birmans 2.8%, Siamese 2.8%, Exotic Shorthair 2.9%, British Shorthair 3.1% and Persians 3.2%. Incidentally this tendency is seen in puppies i.e. smaller birth weight for the larger dog breeds. For comparison the study states that the kitten to female mature weight...

Maine Coon Coefficient of Inbreeding not mentioned on CFA and TICA websites but is mentioned by GCCF

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This information might interest Maine Coon aficionados i.e. those people who are really into the Maine Coon cat. It's about inbreeding which is measured by the inbreeding coefficient (COI). Sarah Hartwell very usefully provides a diagrammatic chart of the coefficient of inbreeding. It is a scale of 0 to 1 but is often presented as a percentage. So, for example, when siblings are bred to each other the coefficient of inbreeding is 25% and when first cousins are bred to each other the coefficient of inbreeding is 6.25%. COI chart as presented by Sarah Hartwell on her website messybeast.com . Inbreeding depression When breeders inbreed their cats too much it can cause what the cat fancy describes as inbreeding depression which is a compromised immune system and even anatomical defects such as you see in the white tiger. The white tiger by the way is heavily inbred. Inbreeding depression means ill health basically and a shorter lifespan and weak kittens et cetera. It's what you wou...

'New-style' Maine Coon versus the 'old-style' Maine Coon; a bad development?

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According to a Maine Coon cat breeder, Debbie, in The Netherlands, developing within the cat fancy and among Maine Coon breeders, there is a 'new-style' Maine Coon. This is unofficial. It is in breach of the breed standard or should I say breed standards because there are several leading cat associations with their own breed standard but with respect to this breed, they are similar. Siamese cat But the concept of "new-style" compared to "old-style" comes from the Siamese cat. The Siamese cat has many different appearances from the "Applehead" (more cobby features) to the "old-style" (more classic looking) and the 'Modern Siamese' (super slender) as I have referred to it . There is also the Thai cat which is also a Siamese cat which is meant to be the same as the original version. Push boundaries The point I'm making is that breeders tend to go their own way and push the boundaries of the breed standard and go beyond those boun...

Is the Maine Coon cat inbred?

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How long will this Maine Coon kitten live? More than 11 years? Image: MikeB from images in the public domain. The question whether the Maine Coon cat is inbred is very important. I have just written a couple of articles, one about inbreeding depression and how it's caused and its effect on health, and the other an article about the lifespan of domestic cats comparing purebred cats with non-purebred cats. These are important and both affect the Maine Coon. Please click on the links to read them: Inbreeding depression cause and effect Lifespans of some purebred and random-bred domestic cats UK (some startling stats) When I did that research I came across a study and presentation, the results of which you can see by clicking on the second link above , which came to the conclusion that the average lifespan of the Maine Coon cat is 11-years-of-age. I found that statistic shocking.  The Abyssinian's average age is 10 years while the Bengal cat is 7.3 years according to this study. P...

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