I have some experience with rodents, birds and insects eating some of my fruit.
However, I have never had a tree completely denuded of all fruit in a very thorough fashion. My pomegranates were completely hollowed out over a period of one week (last week of August). I live in the California Inland Empire on the border of San Bernardino and LA Counties. Any ideas? Here is an image of the aftermath:

It looks more like a squirrel or rat type of chew marks. They could be using them as a source of water if it's been really dry there.