“When it comes to pain, love, joy, loneliness, and fear, a rat is a pig is a dog is a boy.”— Ingrid Newkirk
“Speciesism is morally indistinguishable from racism, sexism, and other forms of prejudice.”— Gary L. Francione
“Speciesism... is a prejudice or attitude of bias in favor of the interests of members of one's own species and against those of members of other species.”— Peter Singer