Hmm... If house #2 is a sub-feed from the main panel in house #1, I think I'd be inclined to want a separate neutral & ground on the sub-feeder cable and no N-G bond at #2's panel.
A bad neutral on the sub-feeder might result in some 120V popping on inreased voltage, but it would prevent the neutral current flowing back via the water line. (And no dryer/range in house #2 to have its frame bonded to neutral, either!)
But, even if the panel at house #2 is technically a sub-panel, the NEC would require a N-G bond because it's the main panel serving a separate building, right?
