In my opinion “special edition” isn’t the most diplomatic way of describing a cat whose behavior and temperament aren’t “normal”.

Of course, the word normal needs to be in quotes because the truth is that there is no way to define a truly normal personality in any species. And there certainly is no official definition of insanity in cats.

There is no DSM-IV for cats (heck, we don’t even have a DSM-I in veterinary medicine). Nonetheless, it is clear that cats and dogs can suffer from anxiety disorders (including separation anxiety in dogs), obsessive-compulsive behaviors (such as psychogenic alopecia in cats), impulse control problems, and a host of other psychogenic issues. (Vets use the term psychogenic in place of psychological.)