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In heavy breeds of chickens, warm weather tends to bring about broodiness. [8] Removing eggs each day, out of the sight of the hens, helps avoid broodiness not only in domestic poultry but also in some wild species in captivity. This continued egg laying means more eggs are laid than would occur under natural conditions.
A common practice among hatcheries for egg-laying hens is the culling of newly hatched male chicks since they do not lay eggs and do not grow fast enough to be profitable for meat. There are plans to more ethically destroy the eggs before the chicks are hatched, using "in-ovo" sex determination.
Forced molting typically involves the removal of food and/or water from poultry for an extended period of time to reinvigorate egg-laying. Forced molting, sometimes known as induced molting, is the practice by some poultry industries of artificially provoking a flock to molt simultaneously, typically by withdrawing food for 7–14 days and sometimes also withdrawing water for an extended period.
While a single specific cause is unknown, chronic egg laying is believed to be triggered by hormonal imbalances influenced by a series of external factors. [1] As in the domestic chicken, female parrots are capable of producing eggs without the involvement of a male – it is a biological process that may be triggered by environmental cues such as day length (days becoming longer, indicating ...
The Brabanter is among the lightest of chicken breeds; cocks weigh 1.9–2.5 kg and hens 1.6–2.0 kg. [5] It has a narrow crest and a three-part beard. The crest is unlike that of most other crested breeds such as the Polish: it projects upwards and slightly forwards like that of the very similar Swiss Appenzeller Spitzhauben.
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.
In the early part of the twentieth century, it was one of the principal breeds kept for this purpose, until it was displaced by modern industrial hybrid lines. It may be kept as a dual-purpose bird. Hens lay some 180–200 tinted eggs per year; some layer strains may give up to 250. [7] The eggs weigh about 60 g. [9]
A new record was set when a hen laid 364 eggs in 365 days. [16] They are also known to be good nest sitters and mothers, making them one of the most popular large heritage utility breeds of chicken. Hens lay approximately 190 light brown eggs per year, with an average weight of 55 g ; [ 17 ] : 11 bantam hens lay some 160 per year, averaging 40 ...