The first time that I saw Caesar do this I was sitting on the couch watching TV all snuggled up under a blanket. Caesar jumped up with something in his mouth and buried it in the blanket pushing the imaginary dirt with his nose. It was so interesting. When he was done he sat down beside me. I was curious about what he buried so I picked it out. Big mistake! He looked at me like "You B*#%@!!!" Then he ripped it out of my hand and ran out of the room. Now I never look to see what it is until he's out of site. BTW it was a bully stick that he buried.