I must confess, I don't get the reasoning behind many of the arguements about feed and keeping conditions put forward by those who keep their chickens primarily for meat and eggs.
If one feeds them the same diet as the commercial concerns the eggs and meat are going to be very similar to that of the commercial concerns.
If one keeps the chickens confined in a coop and run then imo there is a strong possibliltiy that the keeping conditions are in fact worse than the pasture raised commercial alternatives.
Many of these people don't keep roosters, much like the commercial concerns.
All the other benefits one usually associates with ranged or free ranged chickens like, forage and garden management are lost.
Coops and containment are expensive if done properly.
Where exactly is the financial benefit and where is the improved life for the chicken?
One may as well buy eggs and meat from a pastured raised commercial concern. I bet, if a full cost analysis is done buy from pasture raised commercial concerns works out a lot cheaper than keeping a few chickens in similar condition in a back yard.