This is a test of commonsense. Complete the next sentence:

How to care for newborn puppies 
Choose a box that is a comfortable size for your dog. 
A whelping box is one in which the dog gives birth. It should also keep the puppies warm and protect them from being squashed if their mother lies on them.

OPTIONS:
- Your box should be able to hold eight puppies in a single piece. Cover the whelping box with a sheet of synthetic or natural bedding.
- A box that is too small will make the puppies feel inadequate and tired. If your whelping box is not built for your dog, you should consider adding a large compartment to the rear/rear end of the box to accommodate your dog's particular needs.
- It is also an ideal place for your dog to sleep while they get used to their new home. This way you can be sure they do not feel cramped in a box or shamed by their mother.
- The box should have 4 sides and a base. Choose a length and width that allows the mother to lie down with her head and legs extended.
The box should have 4 sides and a base. Choose a length and width that allows the mother to lie down with her head and legs extended.