It is really hard to tell sometimes, but Blaze and Diamond truly are best friends! We have two of these funky footballs...one red and one yellow. Both were purchased before Diamond came into our home. Blaze never really cared for them unless, of course, you threw one for him to bring back. Diamond, on the other hand, has adopted the red one. She sleeps on it, drools on it, chews gently on it, and squeaks the heck out of it. So NOW Blaze wants it. And he takes it, much to Diamond's dismay.