Apparently when it comes to poultry you may feed them beans that are cooked but not the ones that are raw. This is because the raw beans have something called hemaglutin that is not good for the chickens.
It seems that junk food is not good for anyone; humans or fowl. It is better to not eat it yourself and thereby risk the highly processed foods landing in the poultry food bucket either. Even if you are tempted to indulge once in a while do not give it to the birds.