Bend Or Spots
Bend Or Spots, also known as grease spots or smuts, are random dark spots on color. They can appear on any color, but do not appear on white. They can be present at birth or develop as a horse ages. The inheritance of Bend Or spots is unknown, however in some cases it does seem to run in families. The name Bend Or comes from a Thoroughbred of that name.
Birdcatcher Spots are small round randomly placed white spots on color. They can appear or disappear over time. There does not appear to be a genetic reason behind Birdcatcher spots. They are not associated with appaloosa. Birdcatcher spots are named after a Thoroughbred of that name.
Horses that are considered to be a curly have curly hair on their bodies year round. The curly coat is usually more pronounced in winter. Curlies often have a kinky mane and tail. Some consider curlies to be hypoallergenic as many with horse allergies do not have an allergic reaction with curly horses. Current research theorizes that there are separate dominant and recessive inheritance of curly coats. The dominant type of curly is what generally makes up the Bashkir Curly Horse and American Curly Horse breeds. The recessive type of curly is what has been found in the Chincoteague Pony and also appears in a great variety of breeds. A recessive curly will inherit it from both parents. The parents of a curly can have normal straight hair as a carrier will not be affected. The curly coat can skip generations. There is not a genetic test for curly at this time.
Dark spots on a pony's white legs are called ermine spots. Ermine spots can occur on any leg that is white and are a form of occluding spots. They are often found close to the hoof, but can be found higher on the leg. Ermine spots can range from one or two spots to many. Ermine spots are often a sign of homozygous tobianos. Large numbers of ermine spots tends to run in some families.
Lacing, also known as giraffe markings, marbling, or catbacked, is a white lace looking pattern that develops on the top of the back. It generally starts along the spine and stretches outwards. There is no known genetic reason behind lacing, however it has been known to run in some families. Skin diseases can also cause lacing, but not exclusively.
Occluding spots are areas of color that have been added back to white markings or suppress areas of white markings. Ink Spots/Cat Tracks and Ermine Spots are types of occluding spots.
Somatic mutations create markings that are not related to anything genetic and cannot be passed on to offspring. Somatic mutations are due to conditions in the womb and cannot be deliberately created.
Skin Disease Marks
White marks can also appear to skin diseases due to fungus or allergies. They are not genetic and not inheritable.