Could super-sized and intelligent detrivore aliens exist?

For my story I have an alien species who are detrivore. They are also an intelligent species on par with humans. But many people have pointed out to me that intelligent detrivores don't work, because their diets don't support a large brain or a large body.

My question is therefore whether intelligent detrivores that are human sized could exist on a planet with the following characteristics:

• super sized fauna being super common (for average size think titanosaur)
• most fauna having super inefficient digestive systems so that their waste is rich in calories
• detritus covering the floors of almost all the land on the planet

posted over 6 years ago

Amoeba‭

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