Eggs per Laying Hen per Year

Laying hens: eggs per year

How many eggs you get in a year comes down to two things above all: the breed and how the birds are managed. Commercial hybrids such as Isa Brown, Hy-Line Brown and Lohmann Brown will lay 320-340 eggs/year when kept in a controlled aviary. The Brazilian Embrapa 051 hybrid, bred for semi-intensive systems, sits around ~280 eggs/year. Pure or free-range Brazilian breeds (caipira) come in near 150 eggs/year, though they ask for less feed and less fuss. A productive cycle usually lasts 12-14 months, peaking somewhere between weeks 25 and 35 of life and then tapering off. To put numbers on it: 20 Isa Brown hens × 330 eggs = 6,600 eggs/year, which works out to about 18 eggs a day.

Applications

It helps when you are sizing a commercial aviary, planning production by batch, or running the numbers on a small caipira-egg venture. EMBRAPA Suínos e Aves publishes performance manuals, and MAPA handles laying-flock registration and the sanitary rules. Free-range and caipira systems produce less, but their eggs sell for 2-3× more at market, so the higher price makes up for a good part of the yield gap.

FAQ

Do hens lay year-round? Commercial layers under controlled lighting do, almost every day. In open-air setups that follow the natural photoperiod, laying falls off through autumn and winter, once daylight drops below 12h.

When should I cull the flock? Industrial flocks usually get replaced around 80 weeks, the point where yield slips under 70%. A forced molt can stretch the cycle another 6-8 months, with production a notch lower than before.

How much feed per egg? A commercial hen eats about 110-120 g of feed a day. That comes to roughly 2 kg of feed per kg of egg, or around 125 g for each egg she lays.