One of my cats has the irritating habit of chewing on things.
She has always been a wee bit inclined to gnaw on leather shoes if she comes across them - but we just put that down to them tasting like cow skin or something and hid all our shoes from her.
Problem solved, or so we thought.
But in the last few weeks the chewing has gone up a gear. There are teeth-marks appearing all over the house on furniture and doorframes. All shoes, DH's hat, cardboard boxes, books... anything she can get her fuzzy little chops around will chewed on... and if it is something soft like a cardboard box she keeps chewing until there is nothing left except little mangled spat out pieces of cardboard and no box left 
I always thought it was dogs who chewed things - not cats 
Has anyone else had a cat like this? Did you ever figure out why he/she did it?