What is the dog population size in world?

It's impossible to know the exact dog population size in the world. There isn't a global census for dogs, and the number fluctuates constantly due to births, deaths, and varying levels of pet ownership across different countries and regions.

However, some estimates exist:

* The American Kennel Club (AKC) estimates that there are approximately 90 million dogs in the United States alone.

* Other estimates suggest that there are potentially hundreds of millions of dogs worldwide.

It's important to note that these are just rough estimates, and the true number could be higher or lower.