Mixed pinto is when a pony has more than one pinto pattern. It is often very difficult to determine which and how many pinto patterns a horse carries. Commonly a tobiano that also has another pinto pattern is called a tovero. Tobiano+splashes are very common in Chincoteagues. The patterns can have many different outcomes when interacting to creating more white and others appear to blend into the other pattern due to their minimalness. The expression of multiple pinto patterns can result in unusual looking patterns and markings.
Many of the descriptions below are a guess, with the exception of the blue eyed ponies which are likely a result of splash. Some of the suspected splashes are based upon the appearance of family members or offspring.
Chestnut tobiano with splash or sabino. Leonard Stud, Picture by Amanda Geci.
Black tobiano splash. Misty's Black Mist, 2003, Picture by Amanda Geci.
Bay tobiano sabinos. Ice Cream Sundae and He's a Suitor, Picture courtesy of the National Chincoteague Pony Association.
Bay tobiano with splash or sabino. Star Sapphire, Picture by Amanda Geci.
Chestnut tobiano splashWild filly by Surfer Dude, Picture by Amanda Geci.
Bay tobiano splash. Has a blue eye indicative of splash. Carol's Little Freedom, 2011 and 2016, Picture by Amanda Geci.
Chestnut tobiano splash with blue eyes. Wild colt, 2007, Picture by Amanda Geci.
Black tobiano splash. Flirtatious, 1995, Picture by Amanda Geci.
Chestnut tobiano splash. Zephyr, Picture courtesy of Celina Boltinghouse
Black tobiano splash colt, is likely homozygous for splash as both parents splash. Dam is a bay tobiano+heterozygous splash and sire is heterozygous splash Surfer Dude. Chincoteague Desperado and Island Breeze, Picture by Amanda Geci.
Chestnut tobiano sabino. Feral colt out of Trinity, Picture by Amanda Geci.
Bay tobiano splash. All That Jazz, Picture courtesy of Debbie Ober.
Dark bay tobiano sabino as a foal and as a 3 year old. Wildest Dreams, Picture by Amanda Geci.
Tobiano sabino and tobiano splash. Historical reference. Feral mares, 1977, Photo by Joseph Spies from Wild Ponies of Chincoteague.
Bay tobiano splash. Has blue eyes and dam also appeared to be a tobiano+splash. Historical reference. Feral Foal, 1967, Screen shot from a Wild Kingdom episode.
Chestnut almost all white pinto, likely splash tobiano. Historical reference. Feral Pony, 1967, Picture from a Wild Kingdom episode.