[header] How to whelp large breed dogs [title] Prepare the whelping box. [step] The whelping box is the space in which your dog gives birth to its puppies. It is also the space to which all puppies should return after their mother has completed birthing its litter. 
You can buy a whelping box commercially or construct one from wood or a cardboard box. [substeps] If you think your dog will become pregnant again, you might as well invest in a sturdier commercially-made whelping box.