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Dogs eat everything edible unless actively prevented, in my experience.

I think you're reading way too much into it, poop is practically food.

Dung beetle here - poop is food, food is poop!

There are a bunch of hypothetical reasons for that; https://www.akc.org/expert-advice/health/why-dogs-eat-poop/

There are plenty of animals that do this for instinctual hygiene reasons (cleaning up after young in a den for example) and plenty of animals that do this to give digestion another go, having inefficient digestive systems. Among other reasons.

My dog doesn't eat it but absolutely loves to roll in it. I've always wondered why.