oh wow lol you learn something new every day!! lol i am still brushing up on my colors and genetics = ) i figured it wasn't silver as silver does do that to the mane and tail. and alot of the time bays do general do get white hairs in the mane and tail naturally but yours seems a bit more extreme thats probably from the Lp. i also posted something including the Lp Gene and it does do some crazy things! so the Lp is probably what is making the black points on her legs not look quite as dark unless her legs are just dusty.
Baby, Sparta, Carmen, Henry, Hooch, Mercedes, Butterscotch