The existence of God is something that tends to be ignored in our world. The Bible says that everyone in some way or other knows that there is a God, but many have suppressed that truth.
How about animals? Do they know there is a God? I don’t really know, but in Fly Like a Penguin they don’t question the fact of God. He is their Creator. They live with that underlying, foundational fact of life. The creatures who are on the side of truth have a desire to know his will and live to accomplish it. The others who have made themselves enemies to the heroes of the story live as if there is no God.