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this post was submitted on 19 Apr 2024
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Asklemmy
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Took me a moment to realize the dark mark on her face wasn’t her hind paw.
She's a Siamese chocolate point. In Siamese cats, there is a mutation for the genes of an enzyme (Tyrosinase) that inhibits the production of melanin above a certain temperature. Where the body temperature is lower (extremities, airways), that enzyme is deactivated and melanin is produced, allowing the fur to darken.
Siamese kitten are born completely white, as their temperature is kept high everywhere in the womb, and rapidly start to color after birth.
This is so interesting! Thanks for the cat fact!
I have two ~~Siamese~~ Balinese cats and I never actually knew the practicalities of their coloring... I knew it was something about temperature but I wasn't sure if that was a metaphorical "temperature" or actually talking about millimeters of mercury
Their dark spots also expand when they get old and their circulation worsens as well. Older point color cats will tend to darken on their bellies.