My dog loves this ball. She would give it a 7/5, but I couldn't, because the ball is very hard and she got hurt playing with it.
My 50lb lab mix has OCD and focuses only on that toy she plays with. She loves to chew and has destroyed every toy she's had. I thought this ball would be perfect, since it's to big for her jaws to clamp on and the company professed that it was durable.
It's durable alright, to the point of too much. The ball is hard plastic, without any give. She ended up biting her tongue and bleeding every where. For any and all pet parents, you can imagine my horror at all the blood. So no more ball.
The ball is a great concept, it has given her a lot of exercise and relieved any boredom she had, but the fear of her really hurting herself is not worth that.