HGG Community Forums

See on her image how she has tons of white on her. That is what you should be eyeballing. More white = more lethal.

W is a very high white gene. Tobi and roan could both lead to lethal foals if the stud you breed her too also has a lot of white markings. Splash and frame increase the risk.

I'd check this chart as a reference.
http://hj2.huntandjump.com/forum/discussion/13757/new-kit-lethality-and-kit-mutation-load-explained#Item_11

I had two foals with a mutation load of 82 and I think 85. Not as high but still pretty extreme

Dixie I would breed her to horses without any patterns at the Kit locus. Both Appy and Rabicano are safe with high Kit Load as far as I know, so you can still breed her to patterned horses. Alternatively you can breed her to a solid colored horse. Just make sure whatever you cross her with, it's color tested so you know exactly what you're getting into! All three of those options should be safe--she can only pass on one of her Kit patterns so if the stallion doesn't pass on any Kit pattern, I would think you would be pretty safe. As Ammit has said, splash and frame still increase the "white Load" and could still be unsafe with such a high load in that filly, so I would avoid them as well.

Put more simply, your filly is almost completely whited out. You want to breed her to a stallion who has at least as much color as she has white (so one that has almost no markings at all) to counteract her high gene breakage and get a foal that is healthier and safer to breed. That is what Ammit meant about us being able to start to tell visually whether a combo is safe or not. Two horses that are mostly white aren't going to be safe together. Two horses that are about half white each are may be risky. Two horses with minimal patterns are probably going to be safe to breed to each other.

Very well put @Cheers

WF won't mater as long as you breed her to studs with no KIT mutations. It takes at least a second mutation to cause a lethal foal no mater the white factor.