You still get the dilute even if there is grey, and it isn't always 50% with the grey. You have to know if the grey is heterozygous or homozygous. If the grey is homozygous no mater what the foal will be grey.
So with out testing the grey horse its safe to say 50/50 I can't tell you how many ad's I see guaranteeing a creme foal when bred to anything As the owner of a perlino I would never give such a guarantee if I were breeding to a gray mare because when said baby comes out they will be pretty ticked off when the baby turns gray.
[SIGPIC]Mel and the AQHA gang , Dualing Lil Highbrow, Light Hershey Kiss, Sugs Sweet Playgirl, Oh Cay With Gunplay, Lena's Smart Ichi Cat, Mia Peppy Freckle