So, it all started with Asta, whose nick-name was "Shred-Ex". I'm not sure why we started this, but we began giving the girls the cardboard toilet paper rolls to play with. Asta and Ally loved shredding them. Now onto the next generation, Brooke and Faith love to tear them up into little bits also. They don't eat the pieces, either, so that's good. I leave them with one each when I go to the gym and come back to find bits and pieces everywhere. Anyone else do this with their Shelties?