Sierra is a daughter of the young
smoky black stallion, DM Prairie Smoke'N, also featured
on the "Look-A-Like" page. Her dam is
a very dark brown mare, with no "color"
If Sierra were a brown dun, she
would have been born looking very similar to a bay
dun, with body coat having a caramely-red tone.
Instead, Sierra has the typical creamy-gold tones
of the cream gene on bay or brown foal based color.
Sierra's dorsal, and wither and
neck markings are very common especially on brown
based foals, as it is the beginnings of the brown
agouti gene "caping" over the top line.
These markings can also be found on non-brown based
foals and adults as well due to counter shading
and seasonal sooty.
The masking on Sierra's face is
another trademark of the brown agouti pattern. It
is not dun face masking. Unlike masking
from the brown agouti gene, which capes down from
the top of the head/face, dun face masking only
appears low on the nose, just above the nostrils.