Oh man.... I bought Sasha a Kong Wubba ball, she LOVED it and triumphantly ran around with it in her mouth, and shook it around, but before long she had chewed up the little ball-thing on top. Next, she bit open the fabric and took out the other ball....so now it's just a blue piece of the whole thing left, and she couldn't care less about it...
She does love her KONG though, I fill it with peanut butter and dog treats, it'll keep her busy for a while.
She doesn't care for Nylabones at all, not much for balls either. She loves to play tug though, but it's more fun to steal socks!