Some time ago, it was a sandwich-size zipper-lock bag full of wheat germ and oat bran mixed together. Yesterday, it looked like a katamari ball.
They also got into the sushi rice, TVP, and a bag of jasmine rice. I tossed a few other items in nibbled outer bags for good measure.
Lesson learned: dry goods MUST go into an airtight canister or FoodSaver bags before going into the cupboards.