My Pyrs don't shred plastic, but they would if there were treats inside! :-) I don't put anything in there, just toss it a couple of times then sit back and watch them play with it. Quite entertaining! Barb Bowes Bo, Molly, Chelsea (Pyrs) & Flopsy (Pyr Shep) The more people I meet, the more I like my dog! bamb@monmouth.com