Two cats have learned that they will get a bite of kibble when they ring their bell. Apparently, it works just as well if one cat rings the other cat's bell, too. They have trained their human well.
Sure, it's cute, but aren't you glad they aren't your cats? All night long, you'd be trying to sleep, and Hector Salamanca would be trying to detonate an explosion. But who knows, maybe its better than the racket these two were making before. -via Boing Boing