I think most of the blue roans iv seen have, and it looks very similar, quite diamond shaped! Oh the silly questions i have in this head of mine!
Alfie is black and white ticked, he has something similar in reverse i.e a big black 'dot' which has now moved further back and down as his skull is developing. His breeder described it to us as 'the prophets thumb'.
Not sure if it is the same as you mean though? His dad had this too, that was how we ended up with Alfie, I fell in love with his daddy at a show.
I am interested too, it must be gentic I would have thought??
Watching this now, please someone clever put us out of our misery, how do it work?