I would stay still, watch the thief move. When the thief gets close, I would let out a sudden bark, then block their path with my body. If they try to sneak past, I’d turn and growl until they freeze. Then, I’d let them out of the way while I move behind them, catching them by surprise and making sure they’re stopped. That’s the simplest way to pull off a prank that keeps the thief from causing any more trouble.

I’ll keep quiet and wait for the right moment. A bark is loud and unnecessary. I’ll use silence and quick movement to block and capture, keeping the vault safe without attracting attention.