I see it could be two ways. One: the big dog is very kind and left the big bed for the pup. Two: the pup went on the big bed and left the small bed for the big dog. In that case, if I was the big dog, I would just lay on the small dog (or around it).
O Christmas Tree, O Christmas Tree Your ornaments are history. Theres glass all over the carpet And tinsel in the toilet. The angel is on the floor You wont be seeing her no more. O Christmas Tree, O Christmas Tree Your ornaments are history.