Hmm, Odd Facial Marking (possible mutation?) - The Horse Forum

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post #1 of 14 Old 03-27-2012, 06:19 PM Thread Starter
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Hmm, Odd Facial Marking (possible mutation?)

So, this little guy has been bugging me for some time now. Now, firstly:

This is not my horse. He is kept in the same pasture as my colt though.
I've known this horse since he was born, and have been tracking this marking since then.

These pictures were taken today - camera's date is off -, and this is him pictured with my own colt, Midas.



As you can see, he clearly appears to be a bay tobiano with splash and sabino, just like my colt Midas, who is seen next to him. The colt in question is on the left, and the marking that is odd is that roan-y area on his cheek. It almost appears as if he is greying out.

Now, when he was born in the place of that marking were two GOLD colored smudges. By gold I mean palomino-gold. The nearly solid white part of that marking is where the first gold smudge was. The marking area then over time turned silvery, then the white-grey, and has spread. The colt is now nearing a year old.

The colt's dam is a Seal Brown Tobiano (with sabino.). More confusion comes in about his sire. The mare was bred -on the same cycle- by two different stallions. (again, not my mare, I had no say on her being bred or anything of the like. XD)

Stallion 1 bred her first, he was a black based grey arabian. Stallion 2 bred her at the end of her heat cycle and was a bay tobiano.

If I do so recall, a brown horse cannot produce a bay unless bred to a bay, correct? He doesn't really seem /grey/ either to me though. Which leads me to believe his sire was the bay. That still leaves the question about his marking though, could it be a mutation of some sort? I just haven't a clue what might be doing it and am extremely curious to hear other people's thoughts on the strange marking.
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post #2 of 14 Old 03-27-2012, 06:46 PM
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Subbing. I have a couple theories but I would love to hear what the experts have to say before I make myself sound stupid, lol

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It's called a counter canter...
...A very advanced maneuver.
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post #3 of 14 Old 03-27-2012, 08:13 PM
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I would be interested to see a few pics of his odd marking over time. At the moment, in that picture, it just looks like a bit of sabino that is on his cheek.

As far as a brown mare producing a bay foal - he is a brown too lol. Look at that lovely light muzzle there She sure can produce a brown foal. Think about it this way - while brown is supposedly recessive to true bay, it is still dominant over non-agouti, which would be black. So even if the foal only has one brown gene, it would still express if there was no other agouti gene to tell it not to.

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post #4 of 14 Old 03-27-2012, 08:28 PM
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curious so subbing :)

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post #5 of 14 Old 03-27-2012, 08:48 PM
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Subbing, I am curious as well...

I have seen cows that have had similar markings....black Angus cows that looked like someone threw bleach on, came off the same ranch. Never seen it anywhere else...was guessing some genetic issue.
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post #6 of 14 Old 03-27-2012, 09:04 PM
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You mean that white spot by his eye is a mutation? I don't get this color thing at all.
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post #7 of 14 Old 03-27-2012, 09:49 PM
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Our foal was born brown......and had a dark spot on the side of her rump....every season.......it got white hairs ......it is now completely white.

Here are some pics.
Foal


14 months old



2.5 years old



I did some inquirying with a genetic specialist and told he had never seen anything like it and thought it was a possible birth mark.

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post #8 of 14 Old 03-27-2012, 10:09 PM
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Subbing :)
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post #9 of 14 Old 03-27-2012, 10:16 PM
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I'm curious also, I have a mare with a similar mark under her eye.
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post #10 of 14 Old 03-27-2012, 10:17 PM
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Quote:
Originally Posted by Super Nova View Post
Our foal was born brown......and had a dark spot on the side of her rump....every season.......it got white hairs ......it is now completely white.

Here are some pics.
Foal


14 months old



2.5 years old



I did some inquirying with a genetic specialist and told he had never seen anything like it and thought it was a possible birth mark.

Super Nova
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