parrot
Just shows that you don't need a huge, tough dog to be an effective "watchdog". Just one that will alert the human.
Reminds me of:
A burglar breaks into a bar in the wee hours and heads for the cash register. He hears a voice say, "God is watching!" He freezes and looks around, but does not see anything, so he shakes his head and opens the cash register. Again, the voice says, "God is watching." He jumps and looks around. This time, on the counter behind the bar he sees a large bird cage with a parrot in it. The burglar realizes that it was the parrot who spoke and says, "So, are God." The Parrot say, "No, I'm Samson." The burglar laughs and say, "Samson? Who names a parrot Samson?" And the parrot replies, "The owner - same guy that named the Rottweiller God!"