This Interactive Ball will surely relieve your doggie's boring daily routine! Funny interactive games, water activities and even retrieve training will be much more interesting with this dog toy, equipped with long nylon string. No matter how far you will throw it, your dog won't calm till he finds the ball. By the way, it is not so difficult, as the ball is bright-colored. The strong string is thoroughly attached, so even if your dog will pull it hard, it won't be torn off. The ball is crafted of a unique material, safe and durable foam, able to resist biting. Choose the best for your Bullmastiff to make his life happier!