So I was switching my rats from a crummy block the pet store fed them (dried corn and all) to Oxbow. The bag said do it gradually, so I was feeding them both. Every day since they've been placing the old food in the litter box. Well, I didn't want them to switch foods so suddenly, even though it was obvious they like the new food much better. I left them with all the old food they had this morning and when I got home from work, all of it was in the litter box and there were raisins ALL over the cage, most of which looked half-eaten. My rats basically decided they would rather eat poop all day than their old food! I can't help but laugh...I gave them new food and they're happily munching away, haha. I'm happy too, their coats are already softer and shinier on Oxbow.