My cat, Ace (profile picture), loves jumping into my other cat's kennel when I'm not looking and eats his food. I caught him in the act today and he saw me and ran! I finally got him!
I wouldn't have any reason to think paper is toxic to cats, however, if your cat(s) have a bad habit of eating things they shouldn't, I would stay on the safe side and just keep it away from them.
Cat foods have to conform to AAFCO standards. It's as easy as just saying the cat food conforms to them while subtly it turns out to be the opposite. That's why you have to be careful and read the package label on the bag to see what ingredients make up the chow.
Special Kitty is a great...
My cat Ace (profile pic) had the same thing happen to him as your 2 year-old cat (my cat's 2, btw) earlier this year. His bladder got blocked from crytalized minerals and had to be taken to the vet so his urine could be drained and so that he could revert back to normal. He's on a special cat...
I own two cats who are master escape artists when it comes to getting outside. They have great timing when it comes to running out the door while people walk in. My youngest one, Ace, loves knocking things off tables, stealing stuffed animals from the family, and finding ways to get into food...
I have two cats, a bi-colored domesticated longhair and an American Shorthair tuxedo. The tuxedo is my youngest who's name is Ace, but I call him Crazy Porker, Cutie Pie, Acey-poo, and Captain Fuzzbutt. My oldest one Dakota, the bi-color, I call the Fluff Muffin, Lord Worthless, the Blob...