My cat has pica

Oh, how I wish I were kidding. I should have noticed before now, really I know I should have. But I'm a very busy cat Mommy and I do have the cat from Hell. She likes to climb curtains, get on the counter, the stove, the dining room table, into the ceiling, and pretty much anywhere else she's not supposed to be!
A few months after I got her last May, we realized she was eating insulation! But I figured it was low to the ground, something to play with and she was bored. So we covered it up and we've gotten so many interractive toys around it's NUTS. We're constantly tripping over them.
She ate through the cord to the Wii sensor, and we should have known something was wrong then. We've even taken a few half-eaten hair ties from her. Tonight, she got sick and there were elastic bands of some sort in there. We found an expandable file folder with the elastic band chewed completely off, and another one with a half-eaten band!
I am now thoroughly convinced that my cat has pica! Now we have to determine if it's behavioral or physical. It's most likely behavioral... did I mention she was the cat from hell? And I'm leaving her here when I move to France for most of the year. GOODNESS!
Which means, it's only going to get worse.