My Yorkie, Zozo, has a favorite toy, but I can't find anymore of these to buy for her at the PetSmart where I bought this one. It is a 3-4" rubber ball with little silver bumps all over it. The bumps look like screw heads--straight slot and phillips head types. She holds it in her month by the silver bumps. It also squeaks if you give it a hard squeeze. Ocassionaly she misplaces it. She gets frantic when she cannot find it. does anyone know the name of this toy so I can try to find her a few back-up ones? Thanks so much!