I remember waking up at a horrible hour one morning, and flicking on the light to get a glass of wate. I glanced over at my hamster's cage and couldn't see her anywhere, so jumped out of bed to check she hadn't escaped again. Silly person that I am, I'd left a bag of sunflower seeds on top of the cage, in the corner where there was nothing underneath she could have climbed on to reach them. Yeah, she was a clever little thing, my Hobbes. At 3am, she was gripping the bars at the top of the cage, had chewed through the bag and was sucking sunflower seeds into her cheeks as fast as she could. I picked her up, (little bit difficult as she really didn't want to let go of the bars) and her cheeks were 3 times as wide as her head, and the odd sunflower seed kept popping out! I didn't leave any food on top of the cage after that!