Platinum and whitemark are not prone to anemia and bleeding like Sapphire and Mansfield pearl are. They are healthy animals without any health issues. But, there are some things to note when breeding.
The white face series includes platinum, whitemark, ringneck, and Georgian white. They are dominant genes. When combined with itself or another color morph in this same group/series, the homozygous form is lethal.
That's the only thing platinum and whitemark have against them. So just don't breed your white-face fox to another white-face fox because that would result in losing 1/4 of the litter (the embryos are non-viable).
I'm Fable and Ifrit's mommy. Also mommy to Carousel, Breeze, and a bunch of snakes, lizards, and spiders. Oh, and one amphibian!