Do healthy, high fruit eating animals exist who also have similar digestive mechanics as humans?
For example, while grass-eaters like cows can live on grass, humans should not be expected to since grass eaters have bigger and more sophisticated guts.
I'm wondering if there are animals with similar gut morphology and functionality as a human's gut, who also consume high amounts of fruit. I'm also wondering what those animal's health is like. If they're typically healthy, might that then suggest humans could do OK on high fruit intakes?
If there are healthy animals with similar gut's to humans who also eat high fruit, is there any other reason to think that the healthfulness of those animals could not also apply to humans eating similarly high-fruit diets?