Comment by adrian_b

As a small child, I used to spend a part of the summer vacations with my grandparents, who had some land cultivated with a variety of crops and trees and they also raised some animals, including chicken which roamed freely through a big garden.

I liked to play with the chicken, and by rewarding them with maize grains I have succeeded to train some of them to respond to a few simple commands, like coming to me when called and sitting down, waiting to be petted, and standing up upon commands. (Because those chicken were used to roam freely, they were shy of human contact. Normally it was difficult to catch any one of them.)

My grandparents and their neighbors were astonished, despite the fact that they have kept chicken for all their lives, because they believed that chicken are too dumb to act like this.