Welp. Looks like it’s time for another (educational?) RHS Essay-Post on Animals.
“Don’t have any issues” is inaccurate, or at least unproven. The statistical majority is healthy thanks to carefully selective breeding. HOWEVER: This doesn’t mean that the whole breed is healthy.
Here’s the thing about breeds and health issues: Munchkin cats are so NEW to the world, as a breed, that they’re not old enough for health issues that DO crop up in them to be recognized as a common trait of the “breed” yet.
Scottish fold cats were considered a “safe” breed and hailed as precious, and ethical, and Not Prone to Health Issues– until we discovered how badly damaged they are by osteochrondroplasia. (That is: abnormal developement of bone and cartilage structures.) It’s genetic. It’s a health issue. And, we later found out, it’s the very REASON their ears fold that way– the cartilage in their ears isn’t properly formed. Nor is the cartilage in the rest of their body. Osteochondroplasia is a very painful disease that ALL Scottish Folds are afflicted with to some degree, and it leads to joint degeneration and weakened joints, arthritis, lameness, often crippling the cat for life.
You can’t call munchkin breeding “safe” yet. Sure, they can run and play. But so can dachshund puppies, declawed kittens, and baby white/white chinchillas (the latter of which is always fatal).
Senior dachshunds are prone to spinal degeneration.
When those declawed kittens grow up, there’s a 60% chance of them developing arthritis, particularly around the hips.
And those baby white/white chinchillas won’t live to see their third month.
It’s even known that you can’t breed two Munchkin cats together, because most of the babies won’t survive. When the dominant Munchkin gene– let’s call it by its scientific name, pseudochondroplasia– is homozygous, the same gene inherited from both parents: the gene is lethal, and the affected fetus is resorbed into the mother long before it can be born.
Heterozygous genetics for pseudochondroplasia GENERALLY don’t come with any dangers to hormonal, nutritional, physical, mental, anatomical developement (**As far as we know, in our still yet limited understanding of genetics).
But there are still some concerning appearances of structural deformities associated with Munchkin breeding. Most notably:
- Pectus (the spine is dipped deeper than normal between the shoulders, which leaves a lot less room in the chest cavity, which results in the heart and lungs being pressed in on and constantly stressed.)
- Lordosis (the muscles along the spine are too short, which means the spine doesn’t stay in place where it’s supposed to, sinks into the body, and a lot of cats can’t live more than a few months with this condition.)
Pectus and lordosis are not exclusive to the munchkin mutation, but they occur more often in munchkin kittens than in other breeds.
(It’s no wonder many cat breed organizations actually refuse to recognize Munchkin cats as their own breed, because the “traits” that make a cat a “munchkin” [not JUST short legs] are also symptoms of many, MANY health issues ranging from nutritional deficiencies to viral infections and genetic illnesses. And these associations consider breeding the munchkin cats unethical.)
And as breeders reinforce this pseudochondroplasia gene, strengthen it, and change the way it manifests and interacts with other genes: they’re increasing the chance of these associated afflictions as well.
Any time an animal’s anatomy changes, you are changing the way they move, the way they bear weight, the way their body functions, propagating genes that nature considers deleterious, and a newly-discovered mutated gene can’t be considered “safe” until we’ve THOROUGHLY studied its interaction through far more generations than this mere 30 years we’ve had with breeding munchkins.
What’s more, cats HIDE their pain and coordination troubles. Do you have any idea how arthritic cats that are declawed become? Most people don’t notice it until they do a necropsy. Because declawing is thought to be so commonplace and so safe, that SURELY it doesn’t hurt the kitty and cause health problems! Except, it can cause everything from infection to
misplaced calcium growths to
arthritis to inability to use a litter box.
Statistics for munchkin cat health are still not a very big sample size, let alone anything conclusive.
Until genetics, study, and breeding of Munchkin cats develope much, much further, we can’t conclusively call them free of health issues.
And I, for one, cannot condone any animal that we know runs a steeper risk of health issues, and yet are continued to be bred For The Aesthetic.
(Oh, and p.s.: No, munchkin cats physically cannot jump as high as other cats. They struggle to jump straight up at all.)