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Scientific Opinion on welfare aspects of the management and housing of the grand‐parent and parent stocks raised and kept for breeding purposes

机译：关于为饲养目的而饲养和饲养的祖父母和父母种的管理和住房福利方面的科学意见

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This scientific opinion describes welfare aspects of the management and housing of the grand‐parent and parent stocks (broiler breeders) raised and kept for breeding purposes in EU member states. The health and welfare consequences were reviewed and a risk assessment on the impact of housing and management on the welfare of broiler breeders, including the influence of genetic selection for fast growth, was carried out. Quantitative data on the different types of husbandry and management systems used in Europe is lacking. In the risk assessment process, the overall top five hazards according to risk scores were barren environments, high stocking density, fast growth rate, feed restriction and low light intensity. These varied slightly when the rearing‐laying periods, males‐females, and fast‐slow growing birds were each analysed separately. It is recommended that birds requiring less feed restriction should be selected as future breeders even if this may involve reduced selected pressure on high growth rates. To track improvements over time, the degree of feed restriction required to maintain broiler breeder target weights should be monitored. It is recommended that the prevalence and effectiveness of different types of mutilations is collected and that no mutilation with an effect on welfare as severe as those resulting from cutting off toes or dubbing the comb should be carried out unless justified by evidence for a substantial and unavoidable level of poor welfare in the birds themselves and other birds. Furthermore it was recommended that animal‐based welfare outcome indicators for use during monitoring or inspection of breeder stocks, as well as for monitoring trends over time should be developed.
机译：该科学见解描述了在欧盟成员国中为繁殖目的而饲养和饲养的祖父母和父母种（肉种鸡）的管理和住房福利方面。对健康和福利的后果进行了审查，并对住房和管理对肉鸡育种者的福利，包括遗传选择对快速生长的影响进行了风险评估。缺乏有关欧洲使用的不同类型的畜牧业和管理系统的定量数据。在风险评估过程中，根据风险评分，总体排名前五位的危害是贫瘠的环境，高饲养密度，快速生长速度，饲料限制和低光照强度。当分别对成活期，成年雌性和生长缓慢的鸟类进行分析时，这些差异很小。建议选择需要较少饲料限制的家禽作为未来的种鸡，即使这可能会降低对高生长率的选择压力。为了跟踪一段时间内的改善情况，应监测维持肉鸡育种目标体重所需的饲料限制程度。建议收集不同类型的残割的普遍性和有效性，并且除非有充分且不可避免的证据证明，否则不应进行对福利有严重影响的残割，如因割断脚趾或配戴梳子而造成的残割。鸟类本身和其他鸟类的福利水平很差。此外，建议制定基于动物的福利结果指标，以用于监测或检查种猪种群，以及监测随时间变化的趋势。

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    《EFSA Journal》 |2010年第7期|共81页
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