heatherxenia

I have long been under the impression that Ents didn't eat, they just drank ent-draughts.

But when Treebeard tells of the separation between the Ents and the Entwives, he mentions Ents eating fallen fruit:

the Ents loved the great trees, and the wild woods, and the slopes of the high hills; and they drank of the mountain-streams, and ate only such fruit as the trees let fall in their path; and they learned of the Elves and spoke with the Trees. (The Two Towers, Book III, chapter 4: "Treebeard")

Clearly Ents' main source of nutrition was ent-draughts, not fruit. But they did eat fruit sometimes!

Side note, some people online seem to think that photosynthesis was a major source of nutrition for Ents. I don't see any textual justification for this. It's conceivable that Ents with green leaflike hair (like Leaflock ("Covered with leafy hair he is") and maybe Quickbeam ("his hair was grey-green") could do some photosynthesis, but there's no actual mention of them getting sustenance from sunlight. Also it doesn't seem like all Ents had such hair, and even for those that did, it doesn't seem like enough that it could be a major source of nutrition.