Colostrum is essential for the newborn lamb as it provides nutrients for energy and heat production and passes on disease immunity in the form of immunoglobulins (IgG). Without colostrum in the first few hours of life the lamb would be at great risk from hypothermia, starvation and septicaemia (Binns et al, 2002). Ewes are sometimes unable to provide their lambs adequate colostrum so there is always a need for substitutes. There are many substitute colostrums available and the aim of this trial was to compare three, hyperimmune bovine colostrum, caprine colostrum and an artificial colostrum as a positive control. CO-LATE Ultra Concentrate whole colostrum supplement for lambs (Net-tex Agricultural Ltd) which is manufactured from whole cow colostrum was selected as the positive control as it was found to be most widely used and of average price. Caprine (goat) colostrum has not been widely researched for use with lambs although it is similar in composition to ewe colostrum which may make it more beneficial than artificial colostrums.