Considered the king of the broilers, these birds are bred for feeding your family! They are not layers and will not breed true and create another Giant Cornish.
Cornish are an ever changing breed that carefully bred with certain genetics to create this cross. You will never go back to a store bought chicken after you have raised these birds.
Broiler birds or Cornish Cross type birds are typically ready for butcher between 8 and 10 weeks of age. Yes, they grow that fast!Due to the speed at which they grow they can be a bit challenging to raise. Birds of this type need high protein feed and should be fed on a schedule to ensure that they do not grow too rapidly. Below is a growth rate and feed chart.
This is just an example, there can be many factors in which this chart would not be accurate, including quality of feed, scraps given, exercise, pasture raised vs tractor etc.