Dun Factors
Dun factors - true and false
It has been observed by 'dun' experts that in a true dun the dun factors are the undiluted colour of the underlying coat. False dun factors on the other hand look like a sooty overlay and there is no dilution in the underlying coat.
The true dun factors
Dorsal stripe and dorsal barring
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Red (chestnut) dun  |
Grulla (black)  |
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Dark bay dun  |
Bay dun  |
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Palomino dun (dunalino) - clear coated palomino dun  |
Palomino dun (dunalino) - palomino dun carrying smut which concentrates in the dun factors.  |
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Buckskin dun (dunskin)  |
Silver dun  |
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Buckskin silver dun  |
Classic cream dun  |
Leg barring and mottling
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Bay dun - note the colour of the barring changes according to the underlying coat colour on a bay dun. This is a good indication of a true dun.  Buckskin dun (dunskin)  |
Dark bay dun - note the different colour of the mottling above the black points when compared to the bay dun which is in keeping with the darker coat pigment on the forearm of a dark bay.
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Red dun  |
Mottling and leg barring on a red dun  |
Palomino dun (dunalino). Many palomino duns do not exhibit loud dun factors and on some they are almost invisible.
 Right - mottling on hind leg of a palomino dun |
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Ear tips
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Bay dun  |
Dark bay dun  |
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Red dun  |
Palomino (dunalino) dun  |
Ear edging
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Bay dun  |
Red dun  |
Frosting - on a true dun the frosting is the same colour as the coat whereas on a cream dilute ie buckskin, the frosting is generally cream or white.
Red dun - The light red hair at the top of the tail is the frosting; it is a different colour to the rest of the tail.
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Close up of frosting.  Mane frosting on a yellow dun  |
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Shoulder stripe  |
Cobwebbing and face mask   |
False dun factors or 'countershading'
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Wither shadow on standard buckskin  |
Leg barring on a bay with no dun parentage - bars are not a darker shade of the underlying coat but more a chalky overlay.  |
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False dorsal on chestnut going grey newborn foal. Note the intense colour which is indicative of grey. Again, neither parent is dun.   |
False dorsal on same bay as above with false leg barring - is not a darker shade of the underlying coat but a chalky appearing overlay.  False dorsal on buckskin (no dun parentage) - again more of a chalky overlay appearance  Left - cream guard hairs on a buckskin |
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