Lammacs are polythene jackets which provide protection against the elements for a newly born lamb and help prevent hypothermia which is the major cause of lamb mortality in temperate regions such as the UK. Hypothermia suppresses the suckling instinct of the lamb and any protection against this can help reduce lamb losses. Extreme winter temperatures together with wind and rain can spell disaster for the sheep farmer. Lamb loses due to these cold, wet conditions pose a threat to sheep farmers. Technology Lammacs are made from polythene film which is degradable in ultra-violet light. This is an important environmental consideration as most hill lambing flocks are situated in National Parks and Areas of Outstanding Natural Beauty. Lambs usually shed their Lammacs after about three days and the jackets will then dissolve under natural light over a period of about five weeks. Lammacs are designed to ensure the ewe can smell and identify her own lamb. Mis-mothering is not a problem. Composition Lammacs are available in a number of colours, sizes and pack quantities: STANDARD BLUE – 50 – Vital protection for small and hill-breed lambs. For good visibility, in poor light or at long distance. STANDARD CLEAR – 100 – In clear polythene. Farmers can see mark on lambs through jacket. LARGE ORANGE – 100 – Vital protection for lowland or crossbred lambs. Orange gives excellent visibility against all backgrounds. LARGE CLEAR – 100 – In clear polythene. Farmers can see mark on lambs through jacket. Benefits •Reduced risk of hypothermia •Provide protection during un-forecast adverse weather •No interference with mothering •Marker pen in each pack •Protection provided for a few pence per head •Reportedly less fox predation in lambs wearing jackets •Ultra violet light degradable Efficacy Lammacs were developed in New Zealand where trial results demonstrated their efficacy under challenging climatic conditions.