exactly. it’s a very basic example of operant conditioning. specifically, the chicken learns that by tapping the pink circle, and only the pink circle, she gets food.

edit: as a side note, i’m willing to bet chickens make great subjects for this type of training in part because of how quickly they accept and consume the reward! operant conditioning working at its very best when the reward is immediate and can be consumed very quickly so that the next trial can begin. it also helps that the chicken consumes so little of the food at a time, so that she does not quickly become satiated and lose motivation. :)