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Depending on the laws where you live, you may need to apply for a license from your local government. To find out if you need a license, inquire with your local law enforcement or animal control office.  In some cities or states, any breeder with more than 5 or 10 intact female dogs and who sells puppies will need a license. In many places, breeders of hunting dogs are exempt from licensing. A whelping box is a large box where your female dog will birth and nurse its puppies. Your whelping box should be 2 feet (0.61 m) high, 4 feet (1.2 m), and 4 feet (1.2 m) wide.  Your female lab and her puppies will spend the first three weeks after birth in the box. Afterwards, the puppies and mother dog will be able to move into a cage or similar enclosure. In addition to a whelping box, you'll need cages to house your grown dogs, juveniles, and any other dogs you plan to keep as breeding stock. Grown dogs will need cages that are 42 inches (107 cm) long and 30 inches (76 cm) high. Juveniles and younger dogs will fit in smaller cages, but make sure to move them into large cages when they are mature. The dogs should be able to easily stand up, turn around, and lay stretched out in their cages. If they can't, the cages are too small. Collect towels and sheets from friends or family. If you can't get enough, you can purchase new towels or sheets to use as bedding. Then, spread them out in your whelping box and cages. This will turn the whelping box and cage into a comfortable place for your dogs. . In addition to cages, your dogs -- mature and juvenile -- will need access to open space. As a result, you should create two or three at least 20 by 40 foot (6 by 12 m) fenced areas in your yard. This way, you'll be able to have dogs of different sexes and ages outside at one time. When your puppies are 6-8 weeks old, you need to take them to the vet for an examination and their first set of puppy shots. If you don't take them to the vet for vaccination, you could put them at risk of contracting dangerous illnesses. Ultimately, a responsible breeder will stay in touch with their vet throughout the breeding process.

Summary:
Obtain a license if you need one. Purchase a large whelping box. Get cages to house your dogs. Use old towels and sheets as bedding. Fence in parts of your yard Take your puppies to the vet for vaccinations.