minimal tobiano TB?

I went out to go see this girl on sunday and thought she had interesting legs? The ermine spots to me say tobi but its the strong haloing that really sells it, it also looks like she should have had a small star on her forehead that got obscured by an ermine mark aswell. Looking back at her lines http://www.pedigreequery.com/square+edd… her sire is really the most white I can find in her lines beyond some small hoof white here and there. One of this guy's foals is a http://www.pedigreequery.com/mrazek strong sabino and the http://www.pedigreequery.com/electric+e… other is questionably (based off of lineage) and he has http://www.pedigreequery.com/versye one more filly with a seemingly blonde tail but no white.

Both colts come from a dam with stronger white in the linage, making me think that either the sire is sabino with some mild restriction that bred out on those two colts? 

This filly's dam didn't have any exceptional white in the linage, as she lines back to more ire/gb lines which all seemed pretty solid coloured. I can't recall ever seeing a sabino with ermine markings, as I thought it was a hallmark of minimal tobino with a restrictive factor. I know sabino can cause haloing but its also shared with tobi, however, I didn't know tobiano was in racing thoroughbreds?