My dog also has the small version of this toy, but for chase and fetch she seems to like the bigger version. This is her second "big" wubba.
I have a puppy bull mastiff and he has had this toy since day 1, he is now 6 months old and drops everything for his fav toy!
I gave this to my Mom's dog for Christmas. He is part Hound/Rottweiler/Labrador. It didn't even last 30 mins. He ripped through the fabric in no time and had it torn apart. Usually Kong products stand up, but not this one.