Even if plants were sentient, veganism would still be a moral imperative given that it takes many pounds of plants to produce one pound of flesh.

We do not need to eat animals, wear animals, or use animals for entertainment purposes, and our only defense of these uses is our pleasure, amusement, and convenience.

The distinction between meat and other animal products is total nonsense. Vegetarianism is a morally incoherent position. If you regard animals as members of the moral community, you really don’t have a choice but to go vegan.

But if there were two dogs left in the universe and it were up to us as to whether they were allowed to breed so that we could continue to live with dogs, and even if we could guarantee that all dogs would have homes as loving as the one that we provide, we would not hesitate for a second to bring the whole institution of 'pet' ownership to an end.

To say that a being who is sentient has no interest in continuing to live is like saying that a being with eyes has no interest in continuing to see. Death—however “humane”—is a harm for humans and nonhumans alike.

We can no more justify using nonhumans as human resources than we can justify human slavery. Animal use and slavery have at least one important point in common: both institutions treat sentient beings exclusively as resources of others. That cannot be justified with respect to humans; it cannot be justified with respect to nonhumans—however “humanely” we treat them.

Just as we reject racism, sexism, ageism, and heterosexism, we reject speciesism. The species of a sentient being is no more reason to deny the protection of this basic right than race, sex, age, or sexual orientation is a reason to deny membership in the human moral community to other humans.