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Chickens farmed primarily for eggs are called layer hens. The UK alone consumes more than 34 million eggs per day. [84] Hens of some breeds can produce over 300 eggs per year; the highest authenticated rate of egg laying is 371 eggs in 364 days. [85]
Commercial hens usually begin laying eggs at 16–20 weeks of age, although production gradually declines soon after from approximately 25 weeks of age. [2] This means that in many countries, by approximately 72 weeks of age, flocks are considered economically unviable and are slaughtered after approximately 12 months of egg production, [3] although chickens will naturally live for 6 or more ...
Older hens gradually produce fewer eggs, and the eggs are usually larger. [1] Since the average lifespan of a pet layer hen is 8–15 years, [2] henopause has received attention as a potential problem for backyard or urban chicken farmers who are eventually faced with the decision to either slaughter older layers or keep them as non-producing pets.
Hens and other egg-laying creatures are raised throughout the world, and mass production of chicken eggs is a global industry. In 2009, an estimated 62.1 million metric tons of eggs were produced worldwide from a total laying flock of approximately 6.4 billion hens. [ 3 ]
The price of eggs is expected to rise throughout 2025 due to the bird flu outbreak that killed 17.2 million egg-laying hens in November and December alone. The price of eggs is expected to rise ...
In February 2022, the avian influenza struck egg-laying hens, ... According to AP, an average dozen eggs went from $1.93 to a national average of $4.82 in 2022.
The only living mammals that lay eggs are echidnas and platypuses. In the latter, the eggs develop in utero for about 28 days, with only about 10 days of external incubation (in contrast to a chicken egg, which spends about one day in tract and 21 days externally). [11] After laying her eggs, the female curls around them.
It should be noted that there are nearly 380 million egg-laying chickens and more than 9 billion broiler chickens in the U.S. Despite the spread of bird flu in animals, experts say the risk of ...