Huh I should probably get my cat to the vet... He likes to eat small amounts of hair, leaves, dust and almost all human food (bread, uncooked pasta, sweets, etc. etc.). Of course only until we stop him. We thought he's just bored and a bit stupid but it's definitely not normal.

Edit: we bought cat litter that had grain in it... Yup he ate that out of his litter box a few times :) :)