There are certain groups that govern the registration of dog breeds like, the US-based governing body – the American Kennel Club (AKC) etc.
Qualification for new dog breed
The AKC registers a breed if it qualifies one of the many rules that the breed must have existed for at least three generations.
Dog census
It is done by WHO and local authorities like in the US the pet dog data is collected by groups like American Community Survey, County Business Patterns and American Housing Survey.
How many dogs in the world are there right now ?
Statistics say that there are around 900 million dogs worldwide.
Conclusion
It is difficult to know exactly how many dogs in the world are there right now. All the data are the approximate.