We dog owners have known how smart our dogs really are for a long time now but finally Science is catching up.

Dogs are smarter than toddlers, IQ tests show Border Collies and other bright canines can learn up to 250 words
By Jeanna Bryner
Live Science
updated 8:45 a.m. PT, Sun., Aug 9, 2009

The canine IQ test results are in: Even the average dog has the mental abilities of a 2-year-old child.

The finding is based on a language development test, revealing average dogs can learn 165 words (similar to a 2-year-old child), including signals and gestures, and dogs in the top 20 percent in intelligence can learn 250 words.

And the smartest? The Story continues HERE