Back in the day (TINSIWT) the local farmers "thumped" their livestock, much like one thumps a melon or the back of a recalcitrant child's head, depending of the size of the livestock. Of course, they were 3rd and more generations of livestock raisers and had been taught how and where to thump and what sort of response meant what since they were probably 5 or 6 years old.
Nowadays, with little to no personal contact with the livestock, it's all scientific formulae.
stay safe.