Good management is important for the changing laying hen's reproduction as documented in management reports.[5'7'8] Light, body weight, and environmental management components have the potential to control the hen's growth, behavior, metabolism, physical activity, productivity, egg size, as well as advancing or retarding the onset of egg production. Light programs, temperature control, and body weight control all interact during the rearing and the molt periods in the life of a flock of laying hens. The poultry industry continues to push the upper limits of environmental temperatures, which impacts the growth, productivity, and house environment. This is done to enhance the hen's ability to utilize feeds, nutrients, and energy, thereby enhancing subsequent hen welfare and production performance.
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