HGG Community Forums

In the FAQS Guide ( https://www.huntandjump.com/faq.php ) about 9 or 10 pages down is the Punnett Square that shows the Lethal / Non Lethal genes for White
White 1 is (W) and i think Splash M is (M), SB1 and 2 are both there also

Avoid mares who have W1 or W2 because of his sabino 1 gene. Mares with W3 might be okay but there's a low risk of a lethal foal. Splash 1 is not lethal with anything as far as I know. Splash 2 and 3 are homozygous lethal with themselves (if there are two copies of splash 2 or two copies of splash 3, the foal will not be viable).

The M on the risk chart is for Kit M ;)

Splash M isn't lethal with anything as far as I know.

Here's a link to the chart of Kit mutations giving the lethality ratings for each combination with every white factor. It does not include the lethality of the Splash varieties, nor does it address the lethality of homozygous Frame. There as a later update that included some lethality of the two Sabinos with certain other Kit mutations, as mentioned above. This chart is dated in December 2016.

https://www.huntandjump.com/forum/discussion/16695/lethal-kit-combinations-have-been-drasticly-updated#Item_6

Generally speaking, the more white on the parents, the greater the chance of enough white to be lethal to the foal.