Some people may find some scenes in this film disturbing. Film shows symptoms of Swayback in lambs and prevention. Flock of sheep and lambs, lambs about to die of severe symptoms. Less severely effected lambs and older lambs where the onset of the disease was delayed. Map of effected areas in Scotland and England and Wales. More dead and dying and effected lambs. Normal and effected sheep brain shown. Diagram of lamb inside sheep. Caused by a lack of copper, scenes of pregnant ewes being dosed with copper sulphate, salt licks, and injections. Ministry of Agriculture, Fisheries and Food Animal Health Division