I have been studying the traits and dispositions of the “lower animals” (so called) and contrasting them with the traits and dispositions of man. I find the result humiliating to me. – Mark Twain, Letters from the Earth, 1907

It is a perversely human perception that animals in their native habitat are running wild. – Robert Brault, rbrault.blogspot.com

It often happens that a man is more humanely related to a cat or dog than to any human being. – Henry David Thoreau