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Chick sexing
Chick sexing is the method of distinguishing the sex of chicken and other hatchlings, usually by a trained person called a chick sexer or chicken sexer. Chicken sexing is practiced mostly by large commercial hatcheries to separate female chicks or ''hens'' (destined to lay eggs for commercial sale) from the males or ''cocks'' (most of which are killed within days of hatching because they are irrelevant to egg production). The females and a limited number of males kept for meat production are then put on different feeding programs appropriate for their commercial roles.
Different segments of the poultry industry sex chickens for various reasons. In farms that produce eggs, males are unwanted; for meat production, separate male and female lines for breeding are maintained to produce the hybrid birds that are sold for the table, and chicks of the wrong sex in either line are unwanted. Chicks of an unwanted sex are killed almost immediately to reduce costs to the breeder.〔(Hatchery Horrors: The Egg Industry's tiniest victims ). ''Mercy for Animals.''〕〔(New Investigation Reveals Horrific Cruelty at 'Humane' Chicken Hatchery ). ''Mercy for Animals.'' Retrieved 17 October 2013.〕
==Methods of chick sexing==
There are two chief methods of sexing chicks: feather sexing and vent sexing.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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