500,000 to 1,000,000
the welsh springer spaniel is the most uncommon breed in the us
There is not a specific dog breed that is smarter than any other dog breed in the world than there is in the USA, but the smartest dog breed are poodles.
The US.
We can't answer your question, because you do not give us a breed of dog. Please restate your question
grey hound
grey hound
bulldog
yorkie
Labrador Retriever
Boston terrier
The Labrador Retriever is the most popular breed of Dog in many countries the world over.
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