Bonny the Mathematical Dog

I was just reading an article for my math class which discussed whether or not the concept of numbers and counting was hard-wired in our brains or an entirely learned skill. The author argued, and I agree, that we are hard-wired for numbers at the low end of the counting scale.
My basis for this belief is my certainty that my brain is more developed and higher functioning than my dogs and Bonny can conceptualize three quantity words: one, two, and more. I try to keep at least eight or so whole tennis balls in the house at all times. If Bonny is sitting on the couch with me, I can tell her “get one” or “get two.” Most of the time, she returns with the correct number. She can hold two in her mouth at once so either way it’s a one trip mission. I also can tell her to “get more” and she’ll keep collecting balls until she can’t find any more or I tell her “that’s enough.” Additionally, if she approaches with one ball, I can hold up two fingers and she’ll get another. I admit that last one is probably not a numerical concept but to designate between “get one” and “get two” she must have at least a vague idea of counting.