The practice of mating pet dogs so that the female bears puppies is what Dog Breeders do
. These puppies are either sold to those who would like to have a dog as pet or kept as pet by the breeder. In most breeding is a business for those who have great love for the dogs and can take great care of them. The breeders mate original breed dogs to ensure pure bred puppies as they are most sought after as pet. The breeders tend to acquire dogs both the male and female without any flaw and should be pure bred to ensure good litter.
Any with love for a particular breed of dog can be a dog breeder. As it is likely that love for your pet dog would make you quite knowledgeable on the breed of dog you have as a pet. All you need to have own pure bred pet dogs to start your own kennel. You can have a pet dog or a pair with opposite sex to start with. A good care and proper grooming and training are imparted to the pet dog so as to make the pet a winning candidate in a dog show. Now you can partner with other pet dog owner who has a pet dog opposite in sex to your pet to mate for a litter of puppies. But before you do so you will have to ensure the dog is also a pure bred and has been groomed as much as your pet dog.
There are professional Dog Breeders who even make living out this and more over if you intend to breed quite a few dogs the job would require full time attention. Also there are dog breeders who claim to be breeding pure bred dogs but are best described as back yard breeders. They often breed dogs without proper knowledge of the breed and species. As pet lover if you are just intending to purchase a pure bred it is advisable to check the credentials of the breeder as a genuine breeder is concerned about the dog than the price it fetches.