Question: Why is Eeyore always sad? Does he suffer from depression?
Answer: It's never definitively explained, but Eeyore apparently suffers from depression, is sad about his tail, and generally always feels unhappy. Actually, he is just one character that displays a certain emotional type. Tigger is hyperactive and attention deficit, Rabbit is obsessive-compulsive, Owl is narcissistic, Piglet suffers from anxiety, and Pooh has an eating disorder.
Answer: New animators had a different idea of how she should look and act; it is the same in almost every Disney sequel.
Disney-Freak