I keep reading posts from people just raving about Kong toys and how much your dogs love them. My dog (a 8 month old Chi mix) does not like hers at all. I have put everything imaginable in there. Peanut Butter, the Kong stuff they sell in the pet store (both in the can and the biscut treats), cream cheese, her favorite treats . . . and the most she'll do is gnaw off the end of a treat that is sticking out of the large hole. I don't get it, am I doing something wrong? I would like her to have it because she's at home for a couple of hours while we're at work (I come home at lunch) and that would give her something to keep occupied. Any help??