I'm on a mission. And I know the older I get I may lose a step or two but it's all up in the medulla oblongata. I've got a lot up there. I've got a lot of knowledge... in this medulla oblongata.
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.