Do you know for certain (has she been tested for silver and the cream gene) that his dam is a silver dunskin? Silver has no visible affect on red which is the base coat on a buckskin. The only way you can tell silver on a buckskin is on the mane and tail. It would be 'frosty.' Silver only affects black points or a black body. What color is his sire? Have you used the color calculator to see what the percentages are of your boys color possibilities? Without seeing the horse in person I wouldn't hazard a guess...
Here are some websites that will help:
http://www.mustangs4...or_buckskin.htm
http://grullablue.co...or_markings.htm
http://www.horse-gen...ver-dapple.html
I have been studying color genetics for several years and am absolutely amazed and astonished by the beautiful combinations you can arrive at with the dilution genes...
Here are our dilutes:
Rohan: silver black stallion that is a chocolate (taffy) with light, almost flaxen mane and tail.
Bella: silver dapple filly that is the color of platinum
Freckles: silver bay homozygous tobiano broodmare who looks just like a regular blood red bay tobiano horse but instead of black mane and tail, she has a frosty mane and tail
Concho: smoky grulla stallion who is homozygous black with a splash gene
Casper: cremello stallion
Wind: Smoky black splash filly
Annie: Smoky black homozygous tobiano broodmare
Bottom line: I would test to be sure.
Kari
We also have several horses with sabino, splash, overo and tovero. I've studied the white patterns extensively as well.
Kari