Winter shearing of ewes has been shown to reduce the incidence of hypoglycaemia in twin bearing ewes (Symonds et al, 1986), increase litter birthweight and reduce lamb mortality especially in housed conditions (Austin. 1982. Vipond et al, 1987). It is however not clear if winter shearing effects lamb birth weight independently of nutrient intake or reflects solely an increase in the intake of nutrients in late pregnancy. The aim of the experiment was to study the interaction between changing the source of energy in the concentrate given in late pregnancy and winter shearing in multiparous ewes.
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