In 1981 my mother purchased a registered pinto, (he was actually 1/2 quarter horse (dam) and 1/4 Arab, 1/4 pinto (sire) who was all white with the following exceptions: 2/3 black & 1/3white tail (white at the dock, black on bottom), bay over head, color not meeting on chin, white muzzle, very tiny star, white mane with black mane over crest (forehead). Am I correct to assume he was a skewbald tobiano with his major color being white (basically his entire body except his head)? There were absolutely no brown, black, or any other color markings on his body. I believe white was dominant because of the Arab. Any help is appreciated. His stock was Poco Rag Doll (dam) and Ibn Wittez something or other (sire).