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Traditionally, a flock of broilers consist of about 20,000 birds in a growout house that measures 400 feet long and 40 feet wide, thus providing about eight-tenths of a square foot per bird. The Council for Agricultural Science and Technology (CAST) states that the minimum space is one-half square foot per bird. More modern houses are often larger and contain more birds, but the floor space allotment still meets the needs of the birds.[sup][21[/sup]
传统上，肉鸡约20000鸡在一个鸡舍里，400英尺长，40英尺宽，从而为每只鸡提供8/10平方英尺。农业科学和技术委员会（CAST），最小间距为半平方英尺/只鸡。更现代的鸡舍往往更大，含有更多的鸡，但地板空间分配仍然符合鸟类的需要。
In farms using cages for egg production, there are more birds per unit area; this allows for greater productivity and lower food costs.[sup][15][/sup] Floor space ranges upwards from 300 cm[sup]2[/sup] per hen. EU standards in 2003 called for at least 550 cm[sup]2[/sup] per hen.[sup][16][/sup] In the US, the current recommendation by the United Egg Producers is 67 to 86 in[sup]2[/sup] (430 to 560 cm[sup]2[/sup]) per bird.[sup][17][/sup] The space available to battery hens has often been described as less than the size of a piece of A4 paper.[sup][18][/sup] Animal welfare scientists have been critical of battery cages because they do not provide hens with sufficient space to stand, walk, flap their wings, perch, or make a nest, and it is widely considered that hens suffer through boredom and frustration through being unable to perform these behaviours.[sup][19][/sup] This can lead to a wide range of abnormal behaviours, some of which are injurious to the hens or their cagemates
使用笼鸡蛋生产的蛋鸡地面空间300平方厘米每只鸡。2003欧盟的标准为至少550平方厘米每只母鸡。在美国，由美国鸡蛋生产商推荐的为67到86平方英寸（430到560厘米）每只鸡。母鸡空间经常被描述为不到一张A4纸的大小。动物福利科学家一直在批评鸡笼因为他们没有提供足够的空间站，供母鸡，拍打翅膀，或者做窝。
In the UK, the Defra "Code for the Welfare of Laying Hens"[sup][20][/sup] states furnished cages should provide at least 750 cm[sup]2[/sup] of cage area per hen, 600 cm[sup]2[/sup] of which should be usable; the height of the cage other than that above the usable area should be at least 20 cm at every point and no cage should have a total area that is less than 2000 cm[sup]2[/sup]. In addition, furnished cages should provide a nest, litter such that pecking and scratching are possible, appropriate perches allowing at least 15 cm per hen, a claw-shortening device, and a feed trough which may be used without restriction providing 12 cm per hen.
在英国，食品和农村事务部的“福利蛋鸡”规定鸡笼应提供给每只鸡至少750平方厘米，600平方厘米的可用面积；笼子的高度比鸡高20厘米，无笼鸡舍总面积不小于2000平方厘米。此外，笼子里应该提供一个窝，一个供啄食和磨指甲的设备。每只鸡至少15厘米左右的架子，12厘米的饲料槽。 |
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发表于 2013-2-12 11:22:38
