> Chickens are very sweet animals, and are quite intelligent. They did tests on chickens, and apparently they understand the concept of showing restraint on a

> Chickens are very sweet animals, and are quite intelligent. They did tests on chickens, and apparently they understand the concept of showing restraint on a current action, with the view on having a larger reward later. Something along the lines of: "If you don't eat these grains now, we'll reward you with twice as many grains later". That's something that dogs can't do, for instance.