Whelping Box for Dogs, Dog Whelping Pen with Removable Doors, Puppy Playpen for Indoors, Puppy Supplies & Essentials, 81" x 39" x 20", GreyLarge Size: A spacious size allows you to use this welp box for large breed dogs, small breeds, and medium sizes, ensuring versatility. Two Room Layout: The whelping box for puppies is divided into two rooms to provide an ideal environment for a new mother, allowing her to get her own space when she eventually needs it after the first two weeks are over. Three removable doors, including one in the middle, let you provide open access between areas.