Gwen was good enough to send this along to me this morning to see
Click on the link and go down to Limerick
http://www.trakehners-international…013_foals.html
Never seen one quite like him in the Trakehner breed! 
For you Trakehner experts - where is his colouring coming from and is he well bred enough to warrant consideration as a stallion prospect?
Actually, several foals by Hirtentanz (sire of this colt’s sire) have been presented here in the past who have looked very much like this, so it’s an “H thing” 
H is splash, and there are a few full siblings by H (out of a different dam than this one) who are very, very loud, so the dams were also splash.
I wish I could find a picture of the dam to see how loud or minimal slash she is. The sire is a very under-stated splash
http://sporthorse-data.com/d?i=10746597
Definately comes from the grand sire Hirtentanz. H’s dam was a heavily blinged chestnut.
I hate bald faces. It’s hard to see how one gene complex from one parent could go from a mare with a half bald face and no body color to this. Especially since neither the son or grandson of that mare had any body color at all. This her GREAT grandson.
I went looking for photos. Herzlani was black with a half bald face and four whites. Her dam was a chestnut with a crooked blaze and no indications of any body color, nor was there any in any of her offspring with photos. She did have one son named Dien Herz (Han) who had a bald face. None that I’ve seen photos of had body white. Most were black.
Is it possible that black suppresses sabino/splash?
Viney - yes, black-base does seem to minise the amount of white. A chestnut is most likely to be louder marked.
I’m sure JB will be able to explain this better…
I LOVE this foal. The colour is wild. I’m not a great fan of the totally white head and I don’t like blue eyes/pink rims, but overall this is so cool because it so unusual in the Trak breed. This colour had arrived without compromising the breeding at all. THAT is the cool bit
Why is the link for the foal not working for me? 
Doesn’t work for me either…
Link didn’t work for me either - found a working one:
http://www.trakehners-international.com/nms/catalogs_2013_foals.html
Hope this works for you. Pretty special markings indeed.
So this is not considered Piebald? I know nothing of color genetics. :o
The dam of this colt has very high white legs and is very obviously Splash.
It is entirely possible, and happens more than you might think, for 2 VERY minimally marked splash parents to produce a very loud splash colt
Especially since neither the son or grandson of that mare had any body color at all. This her GREAT grandson.
body color is not a requisite of Splash. This Morgan is tested as Splash
I went looking for photos. Herzlani was black with a half bald face and four whites.
Splash
Is it possible that black suppresses sabino/splash?
It’s well known in the color world that black-based colors suppress white expression of the Overo genetics (splash, sabino, frame, dominant white), and the ee/red-based colors allow more white
[QUOTE=Megaladon;7224610]
So this is not considered Piebald? I know nothing of color genetics. :o[/QUOTE]
Piebald is generically white and black, and skewbald is generically white and a non-black color. So, in those terms, this is skewbald. But more specifically, he’s the Splash pattern, which is independent of color
Educate me.
What’s the difference between splash and sabino?
Lots
Sabino likes jagged edges, where splash likes smooth. The OP colt’s white markings have very smooth edges. If you see a horse with leg white that has a fairly horizontal top to it, that’s splash - think of the leg dipped in white. If it’s pretty horizontal, but still has jagged edges, that’s both splash (horizontal) and sabino (jagged)
Sabino likes to keep color around the eyes, so if you see an apron face (like this foal) where there is also “eyeliner”, then you can be fairly certain it’s Sabino trying to keep color around the eyes.
Sometimes you just can’t tell which is which as there is too little of it, or there’s enough that they’re interfering with each other and you can’t quite tell.
Where are you finding pictures of the foal’s dam, Lis? I’d like to see them. Since the mare Herzchen is in both the damsire and the sire, are you suggesting that’s where the double splash came from? You don’t reckon they were actually breeding for color, do you?
Another question. Is there any white at all on horses that does not come from one of the color complexes?
Depending on exactly what you mean - yes. Birdcatcher spots are white spots that aren’t Tobiano or Overo. Somatic mutations can be pretty white and are just that - some mutation that precluded the development of pigment
I meant “normal” white like facial and leg markings.
No, all normal white markings are the result of some white patterning gene, testable or not.
Tested splash
And no, they are not breeding for color. The horses are very high quality, not very loudly colored, and I think one of the loud foals I saw a couple years ago, the owners were VERY surprised when he came out like that.
[QUOTE=JB;7224618]
Piebald is generically white and black, and skewbald is generically white and a non-black color. So, in those terms, this is skewbald. But more specifically, he’s the Splash pattern, which is independent of color :)[/QUOTE]
OK, that makes sense, thank you!
He’s a Medicine Hat skewbald. Cool.
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