A young chicken is a PULLET, which is a female chicken under one year of age. A fryer is a young chicken that is usually between two and four months old and weighs between two and four pounds. A frier is a young chicken that is usually between four and six months old and weighs between four and six pounds. Lastly, a BROILER is a young chicken that is usually between six and eight months old and weighs between six and eight pounds.