How is a pullet defined in terms of age?

A pullet is specifically defined as a female chicken that is under one year old. This classification is important in the poultry industry, as it helps in managing and categorizing birds based on their developmental stage. Pullets are usually raised for egg production, and understanding their age helps farmers make decisions about feeding, housing, and health management.

The other options reflect different classifications of poultry. A female bird over one year old would typically be referred to as a hen. The definition of a male bird under one year is more aligned with a cockerel, while a castrated male bird is known as a capon. Each of these terms has distinct implications for the care, management, and purpose of the birds in agriculture. Thus, the unique definition of a pullet emphasizes the significance of age in poultry identification and management.