With Pumpkin, it's like clockwork. I know exactly which treats she will eat right away and which ones she will bury. However, I have noticed that it seems the size of the treat has a lot to do with it. Most of the treats that she buries, if I break it into real small pieces, she will eat them right there. But if I give her the treat whole, she starts running around the house trying to find a good spot to bury it. Sometimes I think when I give the bigger ones to her she says "I don't have the energy to break this thing to little pieces to eat...I'll save it for later when I have a treat drought."