[IamKat]

Some hamsters can be picky with their chewables. For example, my female Syrian won't chew on anything unless it's fixed into place. She likes the wooden carrots that you attach to cage bars, and sticks but only if I fix them to the corners (she won't even bother if they're just loose on the floor). I do provide her with whimzee toothbrushes (XS) which I recommend, and also I give her a small piece of hard food every night to keep her occupied (e.g carrot, a peanut she has to crack open, or a Russel Rabbit cruncher). Sometimes it's a bit of trial and error to find what your hamster likes to chew on!