This was the second Teaser Ball I've purchased for my pit mix puppy. He loves chasing, carrying, and shaking it. Due to the open design, it is less durable than his other Jolly Pet toys. Dogs with strong enough jaws can bite and deform the edges of the openings, so I check regularly to make sure he isn't getting off pieces. Despite this, the enjoyment he gets and its durability compared to other brands of toys mean I'll be keeping a Teaser Ball in his toy box.