We can argue about their intelligence (which we would likely define in — Animals

"No one can deny the suffering, fear, or panic, the terror or fright that can seize certain animals and that we humans can witness. ... No doubt either, then, of there being within us the possibility of giving vent to a surge of compassion, even if it is then misunderstood, repressed, or denied, held at bay. ... The two centuries I have been referring to somewhat casually in order to situate the present in terms of this tradition have been those of an unequal struggle, a war (whose inequality could one day be reversed) being waged between, on the one hand, those who violate not only animal life but even and also this sentiment of compassion, and, on the other hand, those who appeal for an irrefutable testimony to this pity. War is waged over the matter of pity. This war is probably ageless but, and here is my hypothesis, it is passing through a critical phase. We are passing through that phase, and it passes through us. To think the war we find ourselves waging is not only a duty, a responsibility, an obligation, it is also a necessity, a constraint that, like it or not, directly or indirectly, no one can escape. Henceforth more than ever. And I say “to think” this war, because I believe it concerns what we call “thinking.” The animal looks at us, and we are naked before it. Thinking perhaps begins there."

"Confined within this catch-all concept, within this vast encampment of the animal, in this general singular, within the strict enclosure of this definite article (“the Animal” and not “animals”), as in a virgin forest, a zoo, a hunting or fishing ground, a paddock or an abattoir, a space of domestication, are all the living things that man does not recognize as his fellows, his neighbors, or his brothers."

"Lest I slight any creature, I must also mention the domestic animals, the beasts and birds from whom I have learned. Job said long ago (35:11): «Who teacheth us more than the beasts of the earth, And maketh us wiser than the fowls of heaven?» Some of what I have learned from them I have written in my books, but I fear that I have not learned as much as I should have, for when I hear a dog bark, or a bird twitter, or a cock crow, I do not know whether they are thanking me for all I have told of them, or calling me to account."

"Will you, laying aside all partiality, consider in the silence of your thoughts that we [humans] are creatures either quite like the rest [of animals], or separated by no great difference? For what is there to show that we do not resemble them? or what excellence is in us, such that we scorn to be ranked as creatures? Their bodies are built up on bones, and bound closely together by sinews; and our bodies are in like manner built up on bones, and bound closely together by sinews."

"Oh, God, enlarge within us the sense of fellowship with all living things, our brothers the animals to whom Thou gavest the earth in common with us. We remember with shame that in the past we have exercised the high dominion of man with ruthless cruelty so that the voice of the earth, which should have gone up to thee in song, has been a groan of travail."

"Sympathy beyond the confines of man, that is humanity to the lower animals, seems to be one of the latest moral acquisitions. It is apparently unfelt by savages, except towards their pets. ... This virtue, one of the noblest with which man is endowed, seems to arise incidentally from our sympathies becoming more tender and more widely diffused, until they are extended to all sentient beings. As soon as this virtue is honoured and practised by some few men, it spreads through instruction and example to the young, and eventually through public opinion."