From pg. 48 of the January 17 TV Guide:
 
Interviewer Question: How did you and Ben Stiller enjoy working with a
ferret in your new movie "Along Came Polly"?
 
Aniston's Answer: Not *that's* an animal I could've passed on.  The
ferret is a very bizarre animal.  It's rodent-like, it smells terrible,
and it's pretty much unpredictable.  It bit Ben.
[Posted in FML issue 4393]