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G (grey) covers everything else, including D (Dun, dun a black horse is grullo) DD is not lethal at all. I actually try to breed for a grullo/ bay dun herd. Welcome, and if you need any helplet me know. Thrilled with having another dun breeder. :)

Thank you both so much for the help with trying to figure this out ! :)

@wildland acres - definitely keep in touch with me and how your lines are going :) would love to eventually end up being able to have a breeding friend who strives for the same color genes!


And @obsidiankitsune - thank you so much for setting my mind at ease with the lethal status :) and thank you for being able to pull up a couple of examples for what I was trying to find. I guess I gotta be smarter then the search bars to find what I wanna find haha. I ended up just putting “must have” D and “must have” G instead of the method you did. Thought I was going crazy!

For the search, a lot of the times it helps if you know exactly what you're looking for. If you know that you want a horse homozygous in a certain gene, let's say At, brown, then you put that gene as "Must have", and all the others on that location as "Must not have". Which means you'd need to put the "must not have" on a, A, and A+. The result would give you horses with only At at that location.

If you want to see a range of Grullo horses with different patterns you can search my mares and stallions on my main account.

I strictly breed Grullo and have splash, tobiano, rabicano, w8, sabino 1& 2, ice 1, Satin, Silver, pearl, w20 and frame running through my lines often multiple patterns per horse so you can see interactions. No grey tho

I also have different combinations of Ee and EE, Dd and DD (horses need to inherit the dominant gene from both E & D to be grullo)

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