
One aspect of design in the natural world is that virtually no food goes to waste. To that point, researchers have discovered many instances of animal coprophagy, poop eating. A study published in the journal Animal Behaviour documents 150 species of animals ranging from adult black bears to baby koalas recycling poop.
Many of the animals could not survive if they didn’t eat the feces of other animals. One example is pikas, small mountain-dwelling mammals on the Tibetan Plateau. They could not survive the harsh winters if they didn’t eat the droppings of Yaks. Blind cave fish can’t leave the cave to forage for food, so they survive by eating the guano of bats that inhabit the caves. Cows have multiple compartments for processing food, but rabbits do not. Rabbits and other small animals survive by eating the droppings of larger animals that have eaten harsh foods, breaking them down to a form the rabbit’s gut can easily absorb.
You might think that animal coprophagy would lead to diseases and parasites, but the nutrition gained vastly exceeds the possible infection for many animals. Capybaras eat their own feces, so you can’t call it waste. An interesting fact is that lab rats eat up to 40% of the poop from other rats and even themselves. If lab workers prevent them from doing that, they become sick from vitamin B12 deficiencies. Insects such as dung beetles survive on animal dung.
Recycling poop gives evidence that God designed the animal world so food is not wasted. Meanwhile, humans are guilty of wasting food, leaving many people to starve. That is why Jesus Christ, in Matthew 25:35-46, told His disciples to give food and drink to those who are hungry and thirsty.
— John N. Clayton © 2025
References: Science News for February 2025, page 27, and Animal Behaviour journal for December 2024, pages 75-86