Contracted foal syndrome (CFS) is a common birth defect in horses. The affected foals are unable to straighten one or more limbs and may be unable to stand. Some may also have a twisted neck, wry nose or scoliosis. CFS can also cause birth complications. Foals with severe CFS are often euthanized. Those with mild CFS or only one limb affected can recover with surgery or splinting of the affected limb(s).