The effect of genotype and litter type on growth rate and milk intake of suckling lambs descended from different breeds and crossbreds.
Data were collected on 136 single and twin Friesian, Polish Corriedale, Friesian × Polish Corriedale, Friesian × Polish Corriedale × Suffolk and Friesian × Polish Corriedale × Ile-de-France lambs born between 1985 and 1986. Milk consumption by lambs in weeks 1-4 was influenced most by genotype and sex, but during weeks 5-8 it was most dependant on litter size. The highest intake was by Friesians and single ram lambs. Growth rate was influenced by genotype and sex. The 3 breed crosses gained the most body weight.