The only thing worth testing is Agouti (to see if she's capable of producing a black), and that's just for color. I would do this test through Pet DNA to get brown checked. Otherwise, you'll only get A or a, no At, and you won't know if 1 or maybe both of her As are either both At (brown) or one of each.
If you want to see what she has regarding white markings, the Splash test (the 1 tests looks for all 3 testable versions) would be interesting.
I wouldn't bother with Sabino, as she'd very likely test negative, but that only looks at SB1 and there are others not testable yet.
That's it. She's not cream or champagne or pearl or tobiano or frame or dun or much of anything else.
It's almost worthless to test for Dominant White, since the test is only for 1 variety, and there are at least 13 testable ones (not publicly available) and she could even have a different mutation.
So, just Agouti (at Pet DNA) and if you're just that interested, Splash
______________________________ The CoTH CYA - please consult w/your veterinarian under any and all circumstances. - ET
She carries hanoverian and TB only, but the Hanoverian part can be just about anything...
Actually no, Hannoverians have rules regarding colours -they do not accept dilutes or patterns. Although back in the day there were horses referred to as "Hannoverian Creams" so they were there at one point. But now I'm pretty sure they don't accept anything other then the standard bay, black, brown, chestnut and grey. Holstein is the same.