[dragnet2]

I read a study that concluded the best defense against burglary is a small, happy dog. Better than a big, powerful dog.

So when no one is home, and the burglars kick in the door and drop kick small happy dog across the room, small happy dog will be sad, much sadder than big powerful dog.

[Skooz]

The idea is that when the little dog starts yapping, the burglars find a quieter house to break into.