I am thinking about buying a dun mare but I looked up her pedigree and it says her sire is a gray by a gray and a bay and her dam is a chestnut by a chestnut and a chestnut. Now I know nothing about the gray gene but I thought that you had to have one dun parent to get a dun. She is definatly a dun with all the marking plus she had a dun filly this year. I do see a lot of dun in her background but I thought this did not matter. I am buying her to breed to my grullo.
Tansy- how old is she? she could turn gray yet. As I understand it, the dun factor can just pop up anywhere. Look back and see if on the gray side that a gray was bred to a dun, the gray can carry that and not have it show as my dun filly that was turning gray was living proof. ( she started dun, but she's not going to stay that way much longer)
The grey modifier can hide a dun gene lurking underneath. The grey parent certainly could have been genetically dun, with the grey inherited that covered the dun. Also, some registries use dun/buckskin in different ways. This horse could be dun, or could be buckskin, but equally it is possible for her to be either with a grey and chestnut parents.
Tansy- I agree with the above, the sire could have passed the dun factor but not the gray gene to this filly easily enough. At this point, I'd expect her to stay the color that she is and not be concerned with passing on the gray modifier, I think if she had it, it would have presented itself by this time.
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