Reminds me of this story.
http://abcnews.go.com/GMA/video/dog-...-lion-18178754
The 911 calls are great. If I caught that dog running towards me to say hello out of the corner of my eye, I may startle a bit. But if I saw it from across the street, from the ride, whatever, I would know within seconds of being attracted to the unusual sight that it was a dog.