Meat birds are bred to be especially lazy because movement requires a chicken to squander its food reserves instead of making drumsticks. For a chicken to get to over 9 pounds in under 8 weeks requires some serious eating coupled with very little movement or strenuous exercise of any type.
Here is a real world comparison between CornishXs as they existed in 1957 and in 2006.
a space of only 49 years.
Notice that the weight of a new chick has only increased by 10 grams from 34 to 44 grams in that time while a 54 day old chick now weighs an astonishing 4,200 grams.
Here is a real world comparison between CornishXs as they existed in 1957 and in 2006.
a space of only 49 years.
Notice that the weight of a new chick has only increased by 10 grams from 34 to 44 grams in that time while a 54 day old chick now weighs an astonishing 4,200 grams.