I have one of those squirrels for my German Shedder! http://www.flickr.com/photos/slave2tehtink/4867111699 For some reason she thinks it's a Very Serious Game, too.
Dex, wth happened to your ears?!
Belle has had FOUR of those in her 6 years. After age 2-3 she stopped chewing on them, but the "death shake" still rips them up. I just bought a new one: #5.