Enlarged right-facing light-gold horse head mark with a black neck, white blaze and mane, and a flowing organic black DNA double-helix eye

    Foal Color Predictor

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    Practical horse genetics for everyday horse lovers.

    Rhiannon and the White Horse No One Could Catch
    Horse Stories
    Nov 1, 2026

    Rhiannon and the White Horse No One Could Catch

    Some horses in old stories are remembered for their color. Rhiannon's horse is one of them. In the medieval Welsh tale Pwyll Prince of Dyfed , a pale-white h...

    Foal Color Predictor

    A practical first release for horse breeders, owners, and handlers.

    Important disclaimer: Results are probability estimates based on the genotypes you enter and widely published Mendelian inheritance for the listed genes. They are not a guarantee of foal color, health, or registry outcome. This site does not provide veterinary diagnosis or treatment advice.

    Lethal White Overo Syndrome guidance applies only to the Frame Overo (EDNRB) N/O × N/O carrier cross modeled here. Double cream, homozygous Tobiano, and homozygous Gray are not LWO. Some rare white-pattern variants outside this tool are evaluated case by case with DNA testing.

    © 2026 Foal Color Predictor. Educational use for the horse community.

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