 The competitive feeding paradigm approach is considered by some as evidence that animals have some understanding of the relationship between "seeing" and "knowing".At the beginning of each trial in the paradigm, a subordinate animal (the individual thought to be doing the mind-reading) and a dominant animal are kept on opposite sides of a test arena which contains two visual barriers.In all trials, a researcher enters the enclosure and places food on the subordinate's side of one of the visual barriers (one baiting event), and in some trials the researcher re-enters the enclosure several seconds later and moves the food to the subordinate's side of the other visual barrier (second baiting event).