when I was younger, we had 2 dogs. One was a Lab Mutt, other was a Fiest.. we let them out to play and our Fiest gets ran over and killed.. we didnt immediately notice what happened, but when we called for the dogs neither came. we walked around our shed and found the Lab digging a hole and he had dragged the Fiest to the hole... I have no idea how the dog knew to bury our dead dog, but it was sorta eerie.. we finished digging the hole and burried the small dog..