Many people today, including biological anatomy scholars and physicians, are raising questions about animals' pain and killing for humans. It is morally right to dissect frogs and worms to educate high school students. On the other hand, the problem of "studying life to protect lives" (1: 131) using biomedical research, education and cosmetics to kill animals can be called "biological anatomy". In the United States, 25 to 5 million animals survived.
We should not prove that we are willing to respect living and death, not to prove that the animals we are killing are natural acts. With our wisdom and compassion we can spend our most free moral life and protect nature and the environment. I think that crop farming can kill animals, but you should not think about how to raise crops while minimizing damage to animals (and environment and human health, but this is another story) . Even if we attempted to kill mice and voles, it is useless to breed animals and kill them. With technology, knowledge and worldwide cooperation we get the opportunity to reduce the impact on animals and the environment. If we do not catch this opportunity, that is selfish.
Is it possible to use them for other purposes in exchange for the friendship and health that humans can provide to animals, and the benefits of life experience themselves, if it is unacceptable to use livestock as food? The answer is yes or no, it has a considerable influence. Still if you are responsible for minimizing pain and pain, you can end your life without pain in this way. Why can not we create biogas heating, create blood and bone compost for organic agriculture, or make meat for human consumption?
Since humans are not animals themselves, do not the innocent animals feel the need to abuse, strike, and kill people? No therefore, animals are not humans, so no one should punish animals and kill them. So in an ideal world animals abuse does not exist. But this is not the ideal world, animals, domesticated wild, abused and beaten every day. Should animals have the right? Yes, it is. Because all animals have a nervous system, not only animals domesticated but also illegal animals may be felt physically and mentally. In the United States, animals are forced to beat, dogged, ignored, or survive every day. In unsanitary situations where there is no food and water, they have no hope of having their sympathy they deserve and living their days, so they have no hope.