Laughter vs. Squealing

Ok, so Penny still hasn't quite figured the whole laughter thing out yet. She has laughed a few more times, but now is just as likely to squeal. It's kind of high pitched. Catfish stopped by to say hello to her and she squealed and you could tell it hurt his ears. Poor kitty. But, Tray is still the most likely person to get a laugh out of her. She finds him enormously entertaining. I think the feeling is mutual.