I've found mice nests containing the oddest items..things you'd never even think they'd want to take home. I've found erasers, leather, parts of candles, pen caps, hair, silk flower parts....the list goes on.
I think maybe much of what they hoard they use for nesting, while perhaps other things they take home thinking it can be eaten later.
Neither of my pet mice or rats liked those Yogie treats....odd.
Shangrala