The lambs that had NOT been dosed had gained 1.22kg while the lambs which had been dosed had gained 2.03kg. This showed that the lambs which had been dosed with Yield had gained an extra 810 grams in seven days. Note that at the time of this trial the weather was particularly bad and there was very little growth. Trials conducted last season showed a greater difference in weight gain between lambs dosed and those not - this was because the lambs used last season were the tailenders and were under stress. The lambs used in the latest trial were not.
Yield is designed for use in animals which are under stress.
While it can be given to healthy animals the results will not be as obvious as when given to animals which are under pressure. Yield can be added to worm drenches etc. Horses - cost same as cattle but 2 litres of Yield would last one horse nearly four years.