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That’s a good dog
Alright, I agree, some dogs are smarter than others. Some dogs are downright dumb—but we still love them. Still, depending on the dog, they can show language and memory abilities as good as those shown by two year old human children. And yet, there’s nothing special about the dog brain. It is the size expected, and has the number of neurons expected for a non-primate mammal of their size. How does their average brain make some dogs so smart?
Here’s an article about how smart dogs are.
Dogs as intelligent as two-year-old children
Here’s an article about how dumb dogs are.
Dog intelligence ‘not exceptional’
Here’s a bit about where dogs came from.
Origin of modern dog has a single geographic origin, study reveals
And here’s an article about the fox breeding experiment that sheds light on the domestication of the dog.