This is the puppy nursery, which used to be my guest room!
The babies start getting weaned and spending less time with mom in this room.  These are 3 x 3' puppy playpens....plenty of room to eat, sleep and play.  My puppies are never taken outdoors until they've had their first shot at 7 weeks of age.  Distemper and parvo are airborne diseases, which unvaccinated puppies are susseptible to.