With this in mind, where do you leave the ‘seasoned’ blanket wrapped around the hot water bottle? In the den. Where does puppy find all their tasty treats throughout the day? In the den. Where will puppy ‘discover’ the most comfortable bedding in the house? In the den. And where does puppy get to eat breakfast, lunch and dinner? You guessed it, in the den! Throughout the first day, do everything you possibly can to illustrate to puppy that their den is THE place to be.