Wooden Whelping Box for Dogs for All Sized Dogs, Dog Whelping Pen with Adjustable Height Entrance Door, Large Puppy Playpen, 81" x 39" x 20", WhiteDog Whelping Box: For all breeds and sizes dogs. Perfect whelping solution for breeders that are both professional and amateur. The puppy whelping box, which measures 81" L x 39. 25" W x 19. 75" H, offers plenty of space for security and comfort. Our whelping box for large breed dogs provides the ideal environment for a new mother to give birth, relax, and care for her young litter. Adjustable Door: Three entrance doors each include two panels that