I haven't seen Kacee do this, but I remember a funny story about Muffin when she was a puppy. I gave her a treat one day. She went to the door and wanted out, so I opened the door and went out with her. She dug a hole next to the grill and buried her treat. That was the only time she ever buried anything in the dirt, too. But she buried lots of things in the covers and such.