Breed categories

The following are all the categories of dog breeds, most based on their appearance or working ability as well as others:

* Sighthounds;
* Scent hounds;
* Terriers;
* Spaniels;
* Spitz/Arctic dogs;
* Herding or Pastoral dogs;
* Guard dogs;
* Working dogs;
* Toy dog;
* Hunting dog;
* Cur dogs;
* Companions;
* Molosser;
* Extinct dog breeds.