The need to find the average liveweights of flocks of sheep without ya
rding and weighing each sheep resulted in the development of a weighin
g trailer that can be taken to paddocks where bulk samples of sheep ca
n be weighed. The trailer was evaluated to test the hypothesis that th
e average liveweight of the sample of a flock of sheep weighed in the
trailer gave an unbiased and reliable measure of the flock's average l
iveweight. The method is easy to use and the evaluation showed that it
was suitably accurate for obtaining the average liveweights. There wa
s no indication of bias towards sampling heavier or lighter sheep and
so the method can be recommended for use in helping to make management
decisions based on average flock liveweights.