Most Helpful Guy
Not at all. A smart organism that is confused maintains secrecy and remains hidden until it can ascertain what it should do. In the real human world, it's the adage "Keep your mouth shut and your eyes and ears open."
Also, though, there is simply shock and exhaustion... and sea sickness. It could very well be that the tiger was not feeling well at all.
Then again, was there even really a tiger? When Pi is interviewed by the Japanese insurance guys, they didn't believe him either. We never really know if Pi made up the story or not.
I say, read the book.