I’m reading Watership Down right now. There are various quotes relating to the story at the beginning of each chapter and the following by Dostoyevsky rang true to me.
“Love animals: God has given them the rudiments of thought and joy untroubled. Do not trouble their joy, don’t harrass them, don’t deprive them of their happiness, don’t work against God’s intent. Man, do not pride yourself on superiority to animals; they are without sin, and you, with your greatness, defile the earth by your appearance on it, and leave the traces of your foulness after you alas, it is true of almost every one of us!” ~ Fyodor Dostoyevsky, The Brothers Karamazov