Birds may display emotions - According to scientists, birds have the right equipment for emotion. They have a limbic system, a specialized portion of the brain, necessary for true emotional behavior. Other than birds, this system is found only in other higher vertebrates - man and other mammals. Bird owners have long felt they can tell whether their pets are happy or sad, fearful or content. Now research is underway to determine whether birds are aware of their own emotions, and the impact this awareness may have on their individual behavior

From

http://www.peteducation.com/article...p;aid=3342

Earth to Brainiacs:

1.  If he is fuzzed up he's happy

2.  If there is blood streaming down your arm he is "every other emotion except happy"

I do wonder how they are going to "determine whether birds are aware of their own emotions".  If they give them surveys to fill in they are likely to chew the pen.