naw, he has a big box of freeze dried McD's cheeseburgers up there, what do you think the waterhose and the curtain is for? When he draws the curtain he chows down man, simple as that.
Actually I have no idea how he is doing it, I am guessing they are putting vitamins or something in his water supply. Or as someone else suggested they are pumping clear gelatin through the water supply hose.
And you have a good point, the human body really can't survive beyond 30 days without nourishment. And I read somewhere, that doctors are predicting by the end of this, his muscles will start to pull away from his bones and his skin will start to split open without nourishment.....there's some nice mental imagery for ya.....sweet dreams tonite

he he he