A friend gently admonished me for giving pieces of bread to the ground birds on my property. Later that same day I was handing out bits of pizza crust to my hens, who voraciously gobbled it up but then I suddenly worried I was harming them by giving it to them I honestly worried that I would find them sprawled lifeless in the coop the next morning. Death by pizza crust. But they were fine. Are chickens different from other birds when it comes to diet? Is their digestive system different?