Chickens in the USA are quite different from what they were not very long ago. In fact, the universal use of the word chicken and no other for that genus of poultry is new; you used to hear "hen" a good bit, but no more. In the olden days (up to maybe 25 years ago) you could still buy, cheap, a "stewing hen", an old one which had outlived its usefulness as a layer and which would be tough and scrawny, therefore sold to be stewed. They have totally disappeared now. When you go to the market now, you have a choice of a roaster, which is usually 4 to 7 lbs. in weight; and a broiler, which is a younger bird and smaller, maybe 2 to 4 lbs. Of course, they keep getting bigger and bigger. Back in the 70's, when we had 3 sons to feed and wanted a 6 lb. fowl, we had to buy a capon.