This is an interesting piece by a Canadian dairy farmer, which shows how differently that country manages dairy industry. Canada uses a supply management system, which sounds similar to the system ASCS managed for our tobacco industry until this century.
To me the bottom line is that supply management can work for a number of years, as it did for Canadian dairy and American tobacco and peanuts, if "work" means maintaining smaller producers. It doesn't work if the priority is innovation and efficiency over the long range.
Today’s conventional broiler chickens have been bred over the years to produce the most amount of meat in as short a time as possible, reducing a farmer’s costs and increasing profits. In 1935, the average broiler chicken reached the slaughter-ready weight of 2.86 pounds in 98 days, according to the National Chicken Council. Today’s broilers are an average of 6.18 pounds at the time of slaughter, when they are about 47 days old.