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Normally the egg is incubated outside the body. However, in one recorded case, the egg incubation occurred entirely within a chicken. The chick hatched inside and emerged from its mother without the shell, leading to internal wounds that killed the mother hen. [8] Embryo development remains suspended until the onset of incubation.
After all, chickens come with a bunch of im-peck-able perks: Fresh eggs in an assortment of beautiful colors, automatic pest control, waste that can contribute to the compost pile or fertilizer ...
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.
Prolactin injection in hens provokes egg laying to stop within a few days, vitellum reabsorption, ovary regression (hens only have a left ovary [14]) and finally broodiness. [ 15 ] [ 16 ] However, attempts to stop broodiness by the administration of several hormones have failed because this state, once evoked, requires time to revert.
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Male chicks on a macerator conveyor belt, seconds before they are killed Chicks ground by a macerator. Chick culling or unwanted chick killing is the process of separating and killing unwanted (male and unhealthy female) chicks for which the intensive animal farming industry has no use.
Highly Pathogenic Avian Influenza — also known as bird flu — is killing layer hens and reducing the nation's egg supply. Eggs are getting scarcer and pricier ahead of the holidays. Here's why.
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.