Skeletal Atavism is a genetic disease which interupts the developmental growth in foals limbs.
Two mutation causing this defect are identified and can be tested now.
Skeletal Atavism is caused by two mutant alleles. Affected foals are Del1/Del1, Del1/Del2, Del2/Del2. Carriers are N/Del1, N/Del2. The genetic testing will give result which mutation your horse carries, if it is a carrier, a affected horse/dwarf or healthy N/N.
You can avoid giving birth to affected foals by responsible breeding. Do not cross carriers!
Should your foal show more abnormalies than abnormal development in the limbs a combination with ACAN-dwarfism is possible.
Affected Breeds: Shetland Pony, American Miniature Horse
Pics on a yearling Shetland Pony: Note the outward bending of the leg and the short distance between hind knee and hock as well as front knee and elbow.
This heritable disease causes skeletal deformations in limbs and impairs the movements.
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