No other breed comes even close to produce the amount of meat in such a short time, even when is done at the backyard level which is not the most productive nor the most efficient way.I gotta agree with @cassie With so many interesting and varying breeds of chicken out there, why push these bellies with legs to their physical limits? Just because you can? There are multiple threads proving these birds can live slightly different lifestyles than "fast meat" but they are the minuscule exception, and I personally fail to grasp the pleasure one gets in trying to prove that out. But hey, to each their own.