the Bible emphasizes the distinction between humans and animals. Humans, not animals, were made in the image and likeness of God. And whereas animals were created with a limited life span, humans had the prospect of living on earth forever. (Psalm 37:29)
Jesus Christ said that to enjoy everlasting life, we must exercise faith and take in knowledge of God things that animals are incapable of doing.
It says that the Creator gave the first humans the opportunity of living forever. Death came only because they rebelled.
What, though, of animals? They are not capable of conscious rebellion against God; yet they live only for a length of time and then die.
Hence, it is clear that the Creator never purposed that individual animals live forever. For them death was natural. 2 Pet. 2:12.