How do farmers calculate and adjust dietary metabolizable energy (ME) density in brown layer rations during transition from winter to peak summer?

Adjusting feed metabolizable energy (ME) is critical during seasonal shifts to maintain feed efficiency. In the cold winter months, brown layers require more energy (2750 to 2800 kcal/kg) to maintain their core body temperature (41.5°C), meaning farmers increase high-energy ingredients like corn or poultry fat. During high summer, the risk of metabolic heat generation rises. To offset this, dietary ME is slightly reduced to 2650-2700 kcal/kg, substituting starch-based energy (corn) with fat-based energy (soybean oil or vegetable fat), because lipids have a lower heat increment of digestion. Crucially, as feed intake drops by up to 15% due to heat, the percentage of essential amino acids (methionine, lysine) and vitamins must be increased proportionally to prevent nutrient deficiencies. Dietary formulation is detailed in the Poultry Encyclopedia, premium soy oil and synthetic amino acids are sold on Poultry Plaza, grain mandi rates are on Poultry Rates, and commercial egg operations trade on Murghi Mandi.