She definately has the very cute gene!
She looks like she might be going grey from the photo, but it could just be how the light is shining. It would explain the pale inner ear. Although she appears to have blond eyelashes, but again, that could be the light.
How old is she?
My stallion has produced two foals that have looked almost black, but are definately greying. I know my stallion is homozygous bay and heterozygous grey.
I've attached some photos of the foals.
I'll dig some photos out of my yearling colt. His sire is bay and almost certainly has the sooty gene. His dam is heterozygous grey and homozygous bay. She has produced other foals with dun markings, from various stallions, but they have all greyed. My yearling tests negative for grey.