Originally Posted by Tryst
I'm not saying she is or she isn't pure Paso, but the white 'spots' are EXTREMELY common in red based horses of all breeds, as are random white hairs and have absolutely nothing to do with Appy genetics. The full reason they form is not fully known, though can be caused by sabino, but likely other genes as well. Many purebred horses get them and they come and go from season to season - some years more and some years less. Most common in chestnuts, but also seen in bays fairly frequently.
I think you hit the nail on the head tryst- the owner likes to refer to her as 'the Appaloosa' but I don't really see anything that remotely points to Appy- who knows!