How do farmers calculate the economic threshold for molting a brown layer flock at 70 weeks versus depopulating and purchasing fresh day-old chicks?

At 70 weeks of age, brown layer productivity and eggshell strength decline, forcing farmers to make a critical financial decision. To calculate the economic threshold: sum the cost of purchasing and rearing a day-old chick up to 18 weeks of age (including feed, vaccines, and labor). Compare this against the cost of molting the current flock, which includes 6 to 8 weeks of zero egg production while the birds rest and regrow feathers, offset by the fact that second-cycle eggs are larger (maximizing volume yield) and feed intake during molting is lower. If chick and feed prices are high, and regional mandi rates for large-sized eggs are projected to be strong in winter, molting becomes highly profitable, extending flock life to 100 weeks. Production economics are explained in the Poultry Encyclopedia, specialized poultry transport cages are sold on Poultry Plaza, live spot prices are monitored on Poultry Rates, and commercial laying flocks are traded on Murghi Mandi.