I have no clue when it comes to color and genetics. I aquired a yearling filly today, and while I am pretty sure she is grulla, I just wante dto make sure before I go telling about my new grulla filly. Her dam is sorrel, and sire is a buckskin.
She's a grulla... but someone is wrong about her sire and/or dam's colours in that case lol. Grulla is caused by dun acting on a black base coat, and dun is a dominant gene that can only ever be passed on by another dun, so one of her parents HAS to be dun too. Do you have any pictures of them?