Dogs are called man's best friend, probably due to their vicious loyalty to their masters. As dogs have been domesticated around 15,000 years ago, it makes it an ideal pet. There are numerous breeds of dogs such as the Terrier and the Mastiff for example in addition to dog types. These two terms should not be used interchangeably as dog type means to categorize the animals by the function it performs. Breeding dogs is the practice of allowing specially selected specimens to mate in order to preserve or create certain qualities or traits.

The qualities of the puppies are determined by natural selection when dogs mate without human involvement. Getting an enhanced new generation of dogs would thus be the motive of many pet owners who breed dogs. However, breeding dogs is a rather complicated task. It's vital that you have a good idea of the intended purpose, genetics and the health condition of the pet in question so that breeding dogs could be done in a fruitful manner. In addition, breeders usually register the birth of puppies in stud books of associations like kennel clubs, where the data regarding the dog including, the dog's lineage and special achievements are recorded. The American Kennel Club (AKC) is such one well known association.

Properly maintaining data about dogs is vital for breeding. Once an owner has information concerning the dog, he/she could analyze them and figure out what traits could be expected and what should be avoided. The breeder may also have to determine whether to inbreed or to out cross. In addition, there are certain set of laws that have to be adhered to when breeding dogs. According to the breed, kennel club and country these regulations may vary. Generally, the rules are made for the well being of a certain breed or several dog breeds and dog breeders have to follow the rules and regulations of an association to be enlisted in their breed programs. In addition, these rules may include various tests to determine the health and working qualities of the dog, and would also include an evaluation by an expert breeder.

Although breeding dogs is a very famous thing, there are specific groups who oppose and condemn the practice. Animal rights groups charge that most breeders are merely concerned about the profit and state that such individuals have no regard of the well being of the animal and thus breeding dogs for purpose of selling is unethical. In addition inbreeding has also been criticized as this may cause the natural hereditary disorders of the dogs to continue into new generations.

Thus, breeding dogs could be thought of as a very delicate matter. A comprehensive knowledge is required by anyone who wishes to perform it.