There are those who would argue that animals are just animals, and animals do not reason through to a God figure, or a lack of one for that matter. I mean, you would logically have to consider God before you could deny God, right? But, scripture has many references to God's influence over the creatures of the earth, and of an animal's sense of "angels" which man does not immediately sense until the angelic being wishes it; scripture indicates an animal's ability to see the angel regardless of the angel's approval. Perhaps this sight was an ability taken from mankind for their offense in Eden or, perhaps, an ability lost due to selfish preoccupation with less spiritual matters, or a general loss of faith.
To consider more of my thoughts, and your own, concerning an animal’s sense of a supreme power in the universe, please follow the attached link to “My Sunday Thought” for next weekend: An Animal Sense of God