Discovery realizes the purpose of the fencing - it is not to keep him in (to make a hoax) but to keep stuff out (to protect him). Discovery concludes that if it is a hoax, where the boy actually is being fed secretly, it must be really intricate, really elaborate, really - unfathomable.
Now Discovery no longer so much doubts the "no food/water intake" of the Buddha Boy - but now they question if the boy is being starved before their eyes actually - for money.