LFS stands for Lavender Foal Syndrome - it is a recessive disease
LFS causes seizures and the death of foals soon after birth. Symptoms include muscle spasms which cause backward arching of the head, neck and spine, and stiff or paddling leg movements. Foals are unable to stand and nurse and are euthanized. There is no effective treatment.
Affected foals have a diluted coat color referred to as "lavender."
LFS is found in Arabians.