Cruelty animal Even though experiments in animals are vital to the development of new discoveries, animal testing for researches is an activity that should be abolished because it is related to the contrast between two values: on the one hand, the ethical reasons and on the other hand, the animal welfare. One of the motives that support this disagreement are the ethical reasons that attack the sensitivity of animals when it is practiced. Human benefits are one of the main justifications for this trivial activity. For instance, in the development of medicine that has been evident since ancient times, in the case of Pasteur, who investigated infectious diseases in domestic animals and discovered the medicine to treat them. In addition, laboratories to test cosmetic products also are involved because to the creation of makeup in companies like Avon in where clinically tests their products in animals and they are poisoned and killed to taste ingredients. Another motive are the cruel procedures used to work with animals. In that instance, China confinement animals in cages during their experiments and animalists consider it an act of extreme cruelty and morally unacceptable because is a humiliation against these beings. Use of toxic substances in animals for the development of products for the tobacco industry, detergents is unacceptable practice due to they are living beings and they do not deserve to be treated that way.