Basically, it says that there is a connection between the balance of physical health in our body and mental health. Not exactly a new idea, but this article relates particularly to probiotics (very hard to find corn-free).
"Those who had consumed the probiotic drink
showed significantly lower brain activity in
the neural networks that help drive responses
to sensory and emotional behavior."
Sensory and emotional behavior. When Raccoon's digestive system is out of whack, those are definitely the two areas where we see it the most. I just checked out the book Gut and Psychology Syndrome, but returned it unread. Maybe I need to take a second look.