Need some help reading genes on white horse!

Hey guys, I have a white horse and I'm having some trouble figuring out what color he is underneath. I've read the genetics guide and looked at horses of different colors to try to find a match, but I'm still not sure about my guy.

These are his genes:
Ee AAt gg CrCr Dd chch FF zz pp stysty rbrb WRn oo Spsp lplp patn1patn1 patn2patn2

I think it's the AAt that's messing me up... I've seen AtAt and Ata, but what does AAt mean? Also, while I'm asking questions - what is FF?

Any genetics genius out there willing to help me out? (:

Edit: This is my best guess... It's a bay base with double cream dilution and dun. This would be perlino dun? The AAt means he is also carrying brown somehow? Is this correct?

Last edited on 2016-04-21 at 14:45:15 by ℕega𝕊onic

Can't guarantee I'm hundred percent right but I think he's a Perlino Dun Splash Roan.

FF is whether a horse has flaxen or not; if a chestnut (or ee) horse has ff, it means their mane is white rather than brown or black.

AAt means the horse is bay but carries brown (if you get AtAt/Ata, you get a Seal Brown horse).

Last edited on 2016-04-21 at 14:51:39 by ζ Nerii Ɏ

Thank you, I edited my post just as you replied - my guess was actually perlino dun! I figured F would be flaxen, but in the genetics guide that gene is called Fl so it confused me a bit. Thank you :)

Keep in mind flaxen is recessive so you won't have flaxen with FF, but rather ff. It doesn't really sound like you thought it was there but I wanted to make sure lol I think it's either been known previously as flfl or maybe some horses do have it as flfl..they appear to be interchangeable though.

Last edited on 2016-04-21 at 15:45:31 by losteh;;