I misunderstood the title of the post. I was expecting to see a question on whether an animal can BE an earth angel.

I was going to answer that animals can have a profound positive impact on humans' lives. They offer a concrete example of unconditional love and acceptance, two things which the human race is in dire need of emulating.

I can absolutely list several animals who made the world a better place merely by living in it. They certainly made their humans' lives immensely better. So while I'm still getting a handle on the new-to-me term of earth angel, I'll say that I won't be the least bit surprised if there are animals who fit the bill.