My wife took record of what she had in the fridge/freezer and most of what she buys are around 5 lb birds. Not sure if I shoudl strive for much higher then that...we have just about none left for our family adter a sunday supper LOL!
I would geuss the quality of free range avaiable may enter into these numbers? I know mine are chowing down on some very high protien in the pasture...alfalfa, timothy, birdsfoot trefoil, clover....