That's too bad.. well hope they learn their lesson. When driving you pay attention no matter what, they're just lucky it wasn't a child. I once saw a jeep hit a baby bear, it came out of nowhere but the guy braked right away and was able to stop. I guess it didn't hit it too bad because,I saw it crawl out from underneath, looked pretty healthy, then another cub passed in front and the mother ran by...
I'm used to outdoor dogs. My parents have a dog, about 13 human years old!, and we've always kept him outside. He gets out of the way when the car turns on. I imagine that dog didn't have enough time to get out of the way.