| The Kennel Club (UK) Toy Group | Canadian Kennel Club Toy Dogs Group | American Kennel Club Toy Group | Australian National Kennel Council Toy Dogs Group | New Zealand Kennel Club Toy Group |
|---|---|---|---|---|
| Affenpinscher | Affenpinscher | Affenpinscher | Affenpinscher | Affenpinscher |
| Australian Silky Terrier | Cavalier King Charles Spaniel | Brussels Griffon (elsewhere Griffon Bruxellois) | Australian Silky Terrier | Australian Silky Terrier |
| Bichon Frise | Chihuahua (Long Coat) | Cavalier King Charles Spaniel | Bichon Frise | Bichon Frise |
| Bolognese | Chihuahua (Short Coat) | Chihuahua (one breed) | Cavalier King Charles Spaniel | Bolognese |
| Cavalier King Charles Spaniel | Chinese Crested | Chinese Crested | Chihuahua (Long Coat) | Cavalier King Charles Spaniel |
| Chihuahua (Long Coat) | Coton de Tulear | English Toy Spaniel (elsewhere King Charles Spaniel) | Chihuahua (Smooth Coat) | Chihuahua (Long Coat) |
| Chihuahua (Smooth Coat) | English Toy Spaniel (elsewhere King Charles Spaniel) | Havanese | Chinese Crested Dog | Chihuahua (Smooth Coat) |
| Chinese Crested | Griffon (Brussels) (elsewhere Griffon Bruxellois) | Italian Greyhound | English Toy Terrier (Black & Tan) | Chinese Crested Dog |
| Coton De Tulear | Havanese | Japanese Chin | Griffon Bruxellois | English Toy Terrier (Blk & Tan) |
| English Toy Terrier (Black and Tan) | Italian Greyhound | Maltese | Havanese | Griffon Bruxellois |
| Griffon Bruxellois | Japanese Spaniel (elsewhere Japanese Chin) | Manchester Terrier | Italian Greyhound | Havanese |
| Havanese | Maltese | Miniature Pinscher | Japanese Chin | Italian Greyhound |
| Italian Greyhound | Miniature Pinscher | Papillon | King Charles Spaniel | Japanese Chin |
| Japanese Chin | Papillon | Pekingese | Lowchen (Little Lion Dog) | King Charles Spaniel |
| King Charles Spaniel | Pekingese | Pomeranian | Maltese | Lowchen |
| Lowchen (Little Lion Dog) | Pomeranian | Poodle (Toy only) | Miniature Pinscher | Maltese |
| Maltese | Poodle (Toy) | Pug | Papillon | Miniature Pinscher |
| Miniature Pinscher | Pug | Shih Tzu | Pekingese | Papillon |
| Papillon | Silky Terrier (elsewhere Australian Silky Terrier) | Silky Terrier (elsewhere Australian Silky Terrier) | Pomeranian | Pekingese |
| Pekingese | Toy Manchester Terrier | Toy Fox Terrier | Pug | Pomeranian |
| Pomeranian | Yorkshire Terrier | Yorkshire Terrier | Tibetan Spaniel | Pug |
| Pug | Xoloitzcuintli (Toy) | Yorkshire Terrier | Yorkshire Terrier | |
| Yorkshire Terrier |
The Fédération Cynologique Internationale breaks down their Toy and Companion Group into Sections by general dog type; within the sections the dogs are listed by their country or area of origin. Also included in the Sections are variants and colours that have to do with how they are organised during dog shows. Since this grouping is for more than Toy dogs, not all of the dogs included in Group 9 are small.
The sections are:
| Maltese | Bichon Frise | Havanese | |||
| Bolognese | Coton de Tuléar | Löwchen |
| Poodle (Toy) | |
| Belgian Griffon | Griffon Bruxellois (Brussels Griffon) | Petit Brabancon | |||
| Chinese Crested | |
| Lhasa Apso | Shih Tzu | Tibetan Spaniel | |||
| Tibetan Terrier |
| Chihuahua (Smooth-haired) | Chihuahua (Long-haired) | ||
| Cavalier King Charles Spaniel | King Charles Spaniel (English Toy Spaniel) | ||
| Pekingese | Japanese Chin | ||
| Papillon (with erect ears) | Phalène (with drooping ears) | ||
| Kromfohrlander | |
| French Bulldog | Pug | Boston Terrier | |||
The remainder of breeds assigned to the Toy Group by other kennel clubs are placed with larger dog breeds of the same type by the Fédération Cynologique International; for example, the toy size terriers are in Group 3, Section 2, Small-sized terriers or Group 3, Section 4, Toy Terriers.
Not included in the Fédération Cynologique Internationale Group 9, Companion and Toy are these breeds that are listed in the Toy Group of some kennel clubs:
| Australian Silky Terrier | English Toy Terrier (Black & Tan) | Manchester Terrier | |||
| Toy Fox Terrier | Yorkshire Terrier | ||||
| Pomeranian | Schipperke | ||
| Affenpinscher | Miniature Pinscher | ||
| Italian Greyhound | |
Most clubs in non-English speaking countries also list small dogs in either a Toy Group or a Companion Group.
Very small dogs are also included in the listings of the enormous and ever-expanding number of specialty registries, minor kennel clubs, dog sports clubs, breed clubs, rare dog registries, and internet based dog clubs and businesses. Each will have its own definition of what breeds belong in their own Toy Group.
In addition, Toy dogs in particular have been used for crossbreeding to create what are called designer dogs, bred either accidentally or to enhance the marketability of puppies, often with cute portmanteau names created from syllables of each breed name. Although there are clubs willing to "register" such designer dogs, they are not breeds of dog. They may be called toy dogs but they are not part of any Toy Dog Group.