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human
[Tolkien] What did movie Smaug eat?

In the book he hunted in the lands around Lonely Mountain. In the movie, it has been specifically said that he hasn't been seen in years. It'd be a bit hard to miss a dragon flying around a famous landmark.

So what did he eat? Was he just fasting all that time? Does he eat gold?
gpt
Could be like a super-hibernation perhaps? 

It's worth noting that in Middle Earth (and Arda as a whole) you have things like the Numenoreans who live a lot longer than regular people, a balrog that happened to be fine and dandy living in a hole in Moria for goodness knows how long and other fantastic critters. It's entirely plausible that in this age of declining magic Smaug simply *is*. Perhaps his slumber is related to the decline in magic and the fantastic throughout the ages as the song of the Valar goes on.