Amy was feeling her "catnip" yesterday and she went around attacking them all at one time or another. I had never saw her attack anything before so it was a real surprise. Imagine my surprise when I was just shooting the video of Giz having a good time with that catnip bar and Amy runs in and attacks her. I think it was a "play attack" and she was just in a playful mood. Samantha's playfullness has got them all playing more, even lazy ole Chester!