Genetic selection key to remarkable growth of chickens

This is, of course, genetic engineering. Done the old fashioned way, but genetic engineering nonetheless. Should we put GMO labels on these chickens? (Answer: Don't be stupid)

They’re double the size they were in the late 1970s and a whopping four times bigger than they were in the late 1950s, according to a recent study by ALES researcher Martin Zuidhof, a poultry scientist from the Department of Agricultural, Food and Nutrition Science.

Not only that, chickens are eating half as much to achieve those sizes, and the size of their meat-dense breasts has increased by 80 per cent. And no, none of this is due to added hormones or steroids. The explanation, says Zuidhof, is simple genetics.