Why do Siamese cats have white hair on their stomachs when they are small and grow up to be black?

Because Siamese cats have a lot of tyrosinase on the surface of their skin, and this substance is very sensitive to temperature. When the temperature is very low, the tyrosinase enzyme pushes up a lot of melanin, making the white fur turn into black fur. Newborn Siamese cats are white and tender with white fur all over their bodies. As they get older, Siamese cats go through winter and the fur on their bellies naturally turns black. If you want Siamese cats to keep their white fur all the time, go live in the tropics so that tyrosinase doesn't have the means to be as active.

Why does this happen?

This is normal because Siamese cats are not the same as ordinary cats, the amount of tyrosinase in the body of ordinary cats is relatively small, although the color of the hair will change, but it will not be as big as the line. The amount of tyrosinase in the body of Siamese cats is very impressive, and when the temperature is high, the activity of this substance will be reduced and will not catalyze a lot of melanin. At colder temperatures, the tyrosinase feels the cold and becomes more and more active. And with still less hair on the belly, and with the belly often on the ground, the hair naturally becomes darker and darker.

The white hairs will gradually fall out and black hairs will grow.

With age, the hair on the Siamese Milk Cat will start to change again and will grow black. The mother cat's belly is warm, so the kittens are white as snow. However, after growing up, Siamese cats will spend the winter alone, and not only will they grow black hair, but they will also get darker and darker, as if they have gone to dig for coal. Most netizens say that having a Siamese cat is like opening a blind box, if the black is pure, the cat will look better, if the black is ugly, the cat will get uglier and uglier.

Summary

Siamese cats are really cute, and having one cat is like having two cats. When they are small, they are brown and gray cats and kittens. When they grow up, they become big black cats and kittens, giving their owners a sense of two experiences.