Feeding conserved forage in the form of silage to pregnant ewes in winter is common practice in agricultural systems in the UK. However, silage as a sole feed in late pregnancy is unlikely to meet the nutritional requirements of ewes carrying twin lambs, and supplementary feeding is usually required. Evidence suggests forage legumes such as red clover and lucerne offer great scope for improving the supply of protein to ruminants (Frame et al., 1998), and feeding silage prepared from these crops could potentially reduce the need for protein supplements. The aim of this experiment was to compare the performance of twin-bearing ewes and their lambs when fed either ensiled red clover, lucerne or ryegrass during late pregnancy.