Peter Singer Accepted The Principle Of Equality

Peter Singer suggests that “having accepted the principle of equality as a sound moral basis for relations with others of our own species, we are also committed to accepting it as a sound moral basis for relations with those outside our own species- the nonhuman animals.” (Singer, p. 1) Singer is right, and makes a strong case when he claims that we should give the same respect to the lives of nonhumans as we do to the lives of humans.
The first argument that Singer makes is for extending the principle of equality beyond our own species. Thus meaning, we should treat nonhuman (animals) with equal consideration because nonhuman have the same capacity for suffering as due humans. This is true due to the fact that nonhumans are capable

of suffering. For example, when a cow gets branded, you can visibly see that the cow is in pain and therefore the cow is capable of suffering. Or for instance if you are torturing a mouse and pulling out its hair, the mouse will be suffering. Based on this information it is only fair to say that nonhumans are capable of suffering and therefore they should be treated with the same principle of equality that pertains to a human; it is bias to exploit nonhumans.
Singer also makes strong points on the topic of experimenting with animals. He references that speciesism justifies experimenting on animals because it leads to discoveries about humans; if this is so, the experimenter must agree that human and nonhuman animals are similar in crucial respect. (Singer, p. 4) In this aspect, if experimenters consider nonhumans to be in contrast to humans, the experimenters are being bias when they choose nonhumans over humans to do the experiment. For instance, the experimenters due test on nonhumans to figure out what the lethal dose of artificial colorings and preservatives are for humans; which is unnecessary to prevent human suffering.