Our Jack Russell Terrier/Dachshund mix loves to play frisbee and we haven't found any frisbee she likes but this one. We've tried many different dog frisbees, and she doesn't like any of them - unfortunately, because they hold up to her chewing a whole lot better than this one!!!  So we have to buy her a new Aerobie ever 3 or 4 months, but she just LOVES this thing.  She quivers all over when we bring it out and she can hardly contain her excitement.  This frisbee goes fast and far, but she is a little speed demon chasing it.  Although it wasn't made for dog use and can't stand up to her teeth for as long as we would like, it is worth every penny because it brings her so much joy.  I ordered some 13" Aerobies by mistake last time, and although they were bigger than she is and would trip her up when she was carrying them, she still loves them.  These are excellent flying frisbees for humans, too, by the way!!!!