Sam is out of his cage on the stand /play gym & doing what he usually does, eating, foraging through the bars at the bottom, pulling bits of cardboard out & re-shredding them & I looked across from my breakfast & see that he is EATING a piece of cardboard! I have never seen him do this, he always just picks up bits & shreds them onto the floor (or the backs of the dogs), this time he was actually tearing bits off & swallowing them...has anyone seen / heard of this behaviour before? Should I be concerned (I am)?

If you are not part of the solution, you are part of the problem
Tracy-Ann & Sam