This disorder is caused by the nanny consuming the plants of the Veratrum family (Hellebore) early during her pregnancy. Ewes are also sensitive. The stage of pregnancy when the plant is consumed determines the nature of deformity, but generally the kids or lambs are born dead or die shortly after. If the plant is eaten late, the offspring grow too large to birth and the mothers die horrible deaths. This is tragic for animals and herdsmen alike.
Mairzy doats and dozy doats and liddle lamzy divey
A kiddley divey too, Wooden shoe!