The slaughter of animals comprises the induction of unconsciousness followed by bleeding to cause death. Today’s slaughter practices are chosen to avoid animal suffering, but what does science tell us about animal suffering? Do animals have emotions? Consciousness? How to study consciousness? Experiments suggest strongly that animals have emotions and are conscious, although many aspects of consciousness are still not understood. However, various brain areas involved in consciousness have been identified and the mechanical, electrical and gaseous stunning techniques used at slaughter, cause dysfunction of one or several of these areas, in different manners to induce unconsciousness.

中文翻译：

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农场动物的意识以及屠宰技术的“方式”和“原因”

屠宰动物包括使动物失去知觉，然后放血致死。今天的屠宰做法是为了避免动物遭受痛苦，但是科学告诉我们关于动物痛苦的什么信息呢？动物有情感吗？意识？如何研究意识？实验强烈表明动物有情感并且有意识，尽管意识的许多方面仍然不为人所知。然而，已经确定了与意识有关的各种大脑区域，屠宰时使用的机械、电和气体击晕技术会以不同的方式导致这些区域中的一个或几个区域功能障碍，从而诱发昏迷。