Feeding and feed conversion
Chickens are omnivores and modern broilers are given access to a special diet of high protein feed, usually delivered via an automated feeding system. This is combined with artificial lighting conditions to stimulate eating and growth and thus the desired body weight.
In the U.S. in 2011, the average feed conversion ratio of a broiler was 1.91 pounds of feed per pound of liveweight. In 1925 the figure was 4.70.
Canada has a typical FCR of 1.72.
New Zealand commercial broiler farms have recorded the world’s best broiler chicken FCR, consistently at 1.38 or lower.