eli5: How are animals able to know that grown foods not native to the area are able to be eaten?

Question

eli5: How are animals able to know that grown foods not native to the area are able to be eaten?

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Answer 1

Same way humans learned. Trial and error. If it didn’t kill the person that ate it first, it must be safe to eat. Now, ask yourself how many people died eating stuff like mushrooms before they found the safe ones.

Higher animal’s can tell what’s safe by learning or knowing from evolution of smell. Others….are still evolving.