As many miniature horse owners have come to realize, there are
the ups and downs to breeding horses, especially the miniature
horse breed. Becuase of their small size and genetic traits,
occasionally breeders find out their beautiful broodmare and stallion
has produced what is called a dwarf. Dwarves normally have special
needs and can be 'hidden' by breeders who are ashamed their
horses have produced a foal of such nature, or they just don't know
it. There are different levels of dwarfism, from slight and moderate to
severe. Some can live comfortably with a little help while others
soon pass on due to their severity of their condition.
Animal research indicates that there are more than 320 separate and distinct types of dwarfism, each with a unique genetic marker and characteristics. But a few common complications with miniature dwarf equines is their leg conformation: generally they have some sort of lax tendon that creates too much bend in a joint and as they grow the joints fuse into place and they are permanently walking on their ankles, heels, ect. Also common is bite problems: either too many teeth for their small mouth, overbite, underbite, molars and incisors out of line. Some even though they are smaller than the average miniature horse, may still have miniature horse size organs...too big for their body! This causes organ failure as they grow and is a common reason for deaths in miniature horses.
Specific types of dwarfism that are commonly seen: Achondroplasia, Diastrophic, and Brachiocephalia.
Achondroplasia: Specific physical characteristics such as short limbs, small ears with a normal head, neck and torso. These deformities do not adversely affect the intelligence or lifespan of the horse. Normal bone growth does not occur and often develops unevenly at the joints, causing crooked legs.
Diastrophic: Literally meaning “twisted limb”, these types of horse dwarfs are characterized by a roached-back with protruding spine, deformed leg bones, short neck, bulbous head, cow hocks and leg ligament anomalies. The brachiocephalic dwarf horse has far more observable anomalies than the achondroplastic dwarf, and this type of dwarfism is far more disabling, primarily because of the severe leg deformities and nasal constriction.
Brachiocephalia: Literally meaning “large head”, these types of horse dwarfs are characterized by small size and large domed heads. This type of dwarf may exhibit deformed limbs, severe malocclusion (monkey jaw, an "under bite with the lower teeth protruding), and a mashed-in face, similar to a Pug dog. Mini's with this condition generally have difficulty breathing and you can sometimes here a ''rattle'' or odd noise when they breath.
While some dwarves can be hard to pick out, others are bred by breeders to produce that smallest horse possible to be sold for a profit. Many vets have pointed out the obvious genetic traits that are passed down when breeding miniature horses.
When breeding miniature horses it is important to remember what your goal is before picking out who to breed. Miniature horse farms in general have a high mortality rate, as high as 1/3 depending on the breeder.
Many dwarf miniature horses suffer from contracted tendons, locking stifles, sinus infections, shoulder dysplasia, restricted breathing, and arthritis to name a few...please think of them before breeding or even caring for a dwarf. They are a *SPECIAL NEEDS* equine.
Our specific information was gathered through research, experience, and a collection of websites listed below:
Also include are websites that can be useful if you are looking to place a dwarf, help a dwarf, or adopt a dwarf: