"My big dog often behaves as if he's dumb as a post, but my small dog is an Einstein." "Size doesn't matter. My big and small dogs are smart on some tasks and not so smart on others." "Molly, my tiny ...

Add Yahoo as a preferred source to see more of our stories on Google. So what’s the number one big dog breed many vets say they’d never own? You might be surprised by the answer, as the breed is ...