Shields Sara J, Raj A B M
Humane Society of the United States (HSUS), USA.
J Appl Anim Welf Sci. 2010;13(4):281-99. doi: 10.1080/10888705.2010.507119.
Prior to slaughter, most farmed birds move through a constant-voltage, multiple-bird, electrical water-bath stun system. Using this system subjects live birds to stressful and painful shackling, and the potential exists for them to receive prestun electric shocks and induction of seizures while still conscious. The existing electrical water-bath stunner settings, particularly those used in U.S. slaughter plants, are not necessarily based on sound scientific data that they produce a consistent, immediate stun, and research indicates that they are not effective in all birds. Further, in multiple-bird, electrical water-bath systems, birds may miss the stunner completely. Evidence suggests that some birds may still be alive when they reach the scald vat. For these reasons, electrical water-bath systems are increasingly under scrutiny on nonhuman-animal welfare grounds. Controlled Atmosphere Killing (CAK), a promising alternative technology, uses gas mixtures to render birds unconscious. CAK systems that stun birds while they are still in their transport crates avoid many of the welfare problems associated with the live-hang process and electrical water-bath stunning.
在屠宰前，大多数养殖禽类会经过一个恒压、多只禽类共用的电水浴致昏系统。使用这种系统会使活禽遭受紧张且痛苦的束缚，并且它们有可能在仍有意识时遭受预致昏电击并引发癫痫。现有的电水浴致昏器设置，尤其是美国屠宰场使用的那些设置，不一定基于能产生持续、即时致昏效果的可靠科学数据，而且研究表明这些设置对所有禽类并非都有效。此外，在多只禽类共用的电水浴系统中，禽类可能会完全错过致昏器。有证据表明，一些禽类在进入烫毛池时可能仍活着。出于这些原因，电水浴系统因非人类动物福利问题而受到越来越多的审视。可控气氛宰杀（CAK）是一种有前景的替代技术，它使用混合气体使禽类失去意识。在禽类仍在运输笼中时将其致昏的CAK系统避免了许多与倒挂活禽过程和电水浴致昏相关的福利问题。
