context: In the very past, humans and other animals live together, peacefully. As human society progresses, humans gradually developed sentience and scientific rational method to take the main control of the biosphere. In seek for new advanced technologies, humans began to take animals or plants as trial targets. In other words, they simply treat other lives as the "means". Sometimes, people have to deal with different levels of damages to other targets such as electric shock for their new technologies or inventories, causing other lives to be painful.
disruption: This becomes extremely debatable for whether to use animals for experiences. In other words, it is a question of whether sacrifice lives to gain other benefits such as technologies.
response: While, some people hold their opinion that somethings can feel pleasure and pain are not worthy of equal moral consideration because it can not play the indispensable rule in determining whether objects should be morally considerate for having too many complex issues, and it should be used in experiments, I hold my opinion that since objects can feel the pain, we should not use them in experiments because we also do not harm people who have the capacity of receiving pleasure and pain.