Hmmm... You could make those arguments...
Pooh/eating disorder: A diet of one food only and lots of it.
Tigger/ADD: Never stops going at all hours of the day.
Eeyore/depression: A donkey with a decidedly gloomy outlook on life.
Piglet/anxiety: Chronically afraid.
Christopher Robin/schizophrenic: Talks to "animals."
Rabbit/OCD: Constantly obsessing over his house, always controlling the situation.
Owl/narcissism: Won't stop talking and is often oblivious to others. Plus dude talks in an English accent... Who does he think he is, Madonna?