I have, actually... it was very cool.
Aviva used to be scared of dogs too. Then one day she was swinging on a swing at a friends' house and there were all these dogs running around the yard who wanted to lick her (which she was terrified of). So, to distract the dogs, I played Fetch with them. At one point, as I was saying something like "over there, doggie -- it's over there!", Aviva sat bolt upright and cried "Dogs Can *Listen*!!!"
Now that she knows we have a common language, she is not afraid of dogs anymore.