Fanny Pak Homemade RattyRat's Review: Although this seemed like a good idea, it fizzled out. We thought our ratties would love hiding in the pocket of our fanny pack, and that it would be an easy way to carry them around. So we cut a hole in the top, took an old rag to line the bottom with, and gave it a try. They hated it. In general, we've found rats much prefer being up on a shoulder near your head.