SABINO is part of the OVERO Paint/Pinto complex, but it is not always expressed as a "pinto" pattern.Here are four mustangs who illustrate the range of Sabino coloring:
   
Lacy spotting similar to Frame Overo; Pure White; Roaned Sabino; "Clyde"-type Sabino markings
 
Calvin, a Sabino Roan owned by Jessica Young and Rocky, a sabino Mustang adopted by Sandy Davitt SABINO is not always easy to identify.
There is now a genetic test that can identify at least one form of it. To learn more, click here: http://www.vgl.ucdavis.edu/service/horse/coatcolor.html#sabino1 Sabino1, in homozygous form, produces the Maximum Overo White color
which looks similar to Lethal White, but is not associated with any health problems. Therefore, it is a good idea to have breeding stock tested for both Frame (which does produce Lethal White) and Sabino (which can closely resemble Frame, but produces a healthy, completely non-lethal white foal)
 Though lumped in with other overo patterns for registration purposes, Sabino is different genetically, and is not connected with Overo Lethal White Syndrome. Current research indicates Sabino is polygenic - that is, controlled by more than one gene. These interact in ways not yet fully understood to create the wide range of sabino expression. Sabino also commonly occurs in combination with other patterns, especially the other Overo patterns (Frame and Splash). Sabino has a wide range of variations: Maximum Sabino is all white; Roaned Sabino is evenly roaned and dappled over the body and face. Clydesdale and Shire draft horses are sabino, although they rarely look "pinto." Minimal sabinos also do not look pinto - they may show as little as a white chin and a small but jagged-edged sock or a few belly spots. These minimal sabinos are genetically capable, in may cases, of producing wildly colored offspring. These Minimal Sabinos are a common source of so-called "crop-out" paint/pinto horses from supposedly solid-colored parents. The typical "Budweiser Clydesdale" is a Sabino. Shire draft horses are also Sabinos. Something in those breeds' genetics USUALLY limits the expression of the sabino gene(s) to just the white markings we associate with each breed.
Well, except for once in awhile:
 
Here are two "loud" sabino Clydesdales. Before the Budweiser Clydes popularized and standardized the minimal sabino look, older-style Clydes were commonly "loud" sabinos. Sabino Characteristics
(a horse must have two or more of these to qualify for registry in the Sabino Horse Registry): • Wide Face White
| • Odd Shaped White on Face
 | • White Chin Spot
| • White Lip Spot
 | • "Milky" Chin
 | • Socks or Stockings That Come to a Point
"Knifeblade" socks
| • Lightning Strikes
| • Belly Spots or Splashes
 | • White Spots under Jaw or Throat
 | 
• Partial Socks or Stockings
| • White Spots on the Legs
Mustang at BLM adoption | • White Hairs on Body Coat
Mustang at Palomino Valley BLM Center | • Roaning Without a True Roan Parent
(The 'roaning' on a sabino is not the same we see with a 'true roan' gene or with the gray gene. The face is roaned along with the body.)
Deanna Morehouse's sabino roans 
Lad, a Sabino Roan Clydesdale colt owned by Chessica Dippner
Sir Patrick, a Roaned Sabino Curly stallion owned by Jackie Richardson in Iowa www.Curly-Horse-Ranch.com
| • Roaning on body, especially lower abdomen
Three variations on Sabino - owned by Deanna Morehouse
Sabino Clydesdale and her colt, owned by Chessica Dippner 
Bay Roan Sabino Shire
"Ian" owned by William Mills
| • Lacey Body Spots
• Markings with Lacey Edges
Mustang at BLM Adoption
Mustang at BLM Adoption
Mustang at BLM Adoption
Sabino Spotting
- photo courtesy of Joleen of 1Rainbowhorses Yahoo Group | • Odd White Patches on the Body
Hoodoo, adopted by Lesley Neuman, has "odd-shaped patches of white" that don't fit neatly into any definite pinto category. He is a breeding stallion, however, and his progeny have all shown strong sabino traits. 
| • Born WHITE from Colored or Spotted Parents
(may have either dark or blue eyes)
Maximum White Sabinos are NOT Lethal Whites! | The typical "Budweiser" Clydesdale is Sabino. So are Shire draft horses.
|
Some Sabinos are hard to distinguish from Frame Overo, Splashed White, Rubicano (part of the Roan-Related Complex), and White More Sabino Pix: 
"Lenny" a Shire stallion | 
Red Dun Sabino mustang | 
Clydesdale | | | | |
Maximum sabino PMU foal
| 
1/2 Freisian Maximum sabino colt
| 
Deanna Morehouse's Maximum Sabino colt, Preston
| 
Elaine Hickman's rabicano-sabino
| 
Martha Conlin and her Shire horse, "Hank"
| 
"Cheyenne", showing typical sabino lacy spotting on the sides, plus "lipstick" around lips
| | | |   
Maximum sabino purebred Arabian filly (KHROWNED N DANGEROUS) owned by Peggy Nickerson |
Both The University of California at Davis and Animal Genetics, Inc. of Florida can test for the presence of Tobiano, Red, Frame, Creme, Silver, Sabino1, and Agouti (Bay). The test for Tobiano can determine whether or not a horse is homozygous of heterozygous (good to know if you are trying to breed for Tobiano). You can download forms for these tests from their website-- follow
the links from http://www.vgl.ucdavis.edu OR, from the Animal Genetics website
http://www.animalgenetics.us/Equine.htm Pages in the WHITE & SPOTS Section: Up | Frame Overo | Sabino | Splashed White | How To Tell The Pintos Apart Up Appaloosa Complex | Tobiano | The Overo Group | Other Pintos l ROAN l RABICANO l OTHER ROAN-LIKE PATTERNS |
