Well back in 1867 the chicken was evented by sir david chicken of italy, this was a great idea as it basicly allowed food to walk about and stuff. But is chicken good for you the answer no as most chickens contain atom bombs, and angry crusader knights. But the question 'how do they help' is simple and uncomplex, basicly if you get your o2 altoms and chemicaly combined it with 4O2AU6 then the the reaction that takes place is caused by the fact that chicken unlike other animals can be used as common garden tools.