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Theyâre over two years old, and are running out of eggs. Chickens are born with a set number of eggs available for them to lay over their life, and depending on the breed, they may lay them over a relatively short time, or a more extended period.
EGG PRODUCTION CYCLE. Birds usually start to lay at around five months (20-21 weeks) of age and continue to lay for 12 months (52 weeks) on average, laying fewer eggs as they near the moulting period. The typical production cycle lasts about 17 months (72 weeks) and involves three distinct phases, as follows.n the fourth column the actual number of eggs produced is shown. On average a bird produces 208 eggs over a twelve-month period, which is a weekly production rate of four eggs per bird. At 21 weeks of age 20 eggs are produced (five birds produce four eggs each) and at 22 weeks 40 eggs are produced, etc.