Thanks for your reply. I haven't tried the holder yet. I did put a pd in the litter box and then taped it down securely and the little boogers still pulled it up!!! I have the litter for my adults who are litter box trained but these guys want to put everything in their mouths right now so I am a little afraid of putting that in with them just yet! And I don't want to take them out just yet they still haven't had even their first shots - they're seven weeks old. I think I will go get a holder and try that!