Provides not only meat and eggs but feathers as well. Chickens fall into several classifications. The broiler-fryer can weigh up to 3 1/2 pounds and is usually around 2 1/2 months old. These chickens, as the name implies, are best when broiled or fried. The more flavorful roasters have a higher fat content and therefore are perfect for roasting and rotisserie cooking. They usually range between 2 1/2 and 5 pounds and can be up to 8 months old. Stewing chickens (also called hens, boiling fowl and just plain fowl) usually range in age from 10 to 18 months and can weigh from 3 to 6 pounds. Their age makes them more flavorful but also less tender. Chicken is an excellent source of protein, and a good to fair source of niacin and iron. White meat and chicken without skin have fewer calories.