I really don't even know, but I they don't have any stuffed toys or squeaky toys because they tear them up right away. Tasha loves to chew a little hole in something stuffed and then pull out all the stuffing.

Tennis balls are a big hit. A LOT of various balls, from tennis ball size to the big soccer ball with the rope ends. They have Nylabones all over the house. I still find bones and balls under the furniture constantly.