Pretesting of any new animal housing system in Sweden must include an evaluation of animal welfare. In 2013, a Swedish hatching company applied to the competent authority (CA) for permission to import, install, and bring into use a system with large furnished cages for breeding birds of layer strains, with ∼70 birds per cage (compared with the current 16 birds per cage). Pretesting of the system was conducted on 3 batches, ∼24,500 birds each of breeding hens and males of Lohmann Selected Leghorn and Lohmann Brown (LB) at the hatching company's facilities. Data recorded included clinical records at 3 different ages on 50 birds in each batch and data from official welfare monitoring during production and at slaughter. The birds in the batches had serious health and animal welfare issues, including high mortality, in particular among LB males. Mortality in the batches was more than double (9.6–11.0%) the average mortality (3.8%) reported for birds in conventional furnished cages (CFC) in Sweden during the same period. Compared with CFC birds in Sweden, prevalence of keel bone bursitis was also high in the batches and there were extensive feather damages, especially in hens. In addition, daily supervision was considered difficult to carry out safely in the system. Thus, the system raised important issues concerning bird health and welfare, and the recommendation to the CA was not to approve the system for the Swedish market. The CA decided to ban the system, a decision supported by the Swedish appeal court.

瑞典对任何新的动物住房系统进行的预测试必须包括对动物福利的评估。2013年，一家瑞典孵化公司向主管当局（CA）申请进口，安装和投入使用的系统，该系统带有大型配套笼子，用于繁殖分层品禽，每个笼子约有70只禽鸟（相比之下，目前的笼子为70只）每笼16只鸟）。该系统的预测试是对3只批次的Lohmann精选来亨牛和Lohmann Brown（LB）的雌鸽和雄鸽的约24,500羽鸟类进行的）在孵化公司的设施。记录的数据包括每批50只鸡在3个不同年龄段的临床记录，以及在生产和屠宰过程中来自官方福利监测的数据。批次中的鸟类存在严重的健康和动物福利问题，包括高死亡率，特别是在LB雄性中。该批次的死亡率是常规配备笼子中的家禽（CFC）报告的平均死亡率（3.8％）的两倍多（9.6-11.0％））。与瑞典的CFC禽类相比，该批次的龙骨骨滑囊炎的患病率也很高，而且羽毛损害也很大，尤其是母鸡。另外，日常监督被认为难以在系统中安全地进行。因此，该系统提出了有关鸟类健康和福利的重要问题，并且向CA推荐的建议是不批准该系统用于瑞典市场。CA决定禁止该系统，这一决定得到瑞典上诉法院的支持。