Best Toy to Date

I have been racking my brain trying to find a good toy to keep Ceana thinking. Low and behold the toy that would drive her mind crazy is a cat toy. Ceana barked and whined at the ball. She carried the toy to different parts of the room first lodging it in corners against walls, and then placing it on different surfaces. Yet to her hilarious dismay, she could not get the ball. Ceana even went and brought another one of her golf balls upstairs to place it next to the toy with the trapped ball to use as possibly some sort of puppy frame of reference. After 35 minutes of barking and fraustration I finally took the ball out of the toy.