Petface Single Tennis Ball Yellow. Keep your pooch entertained with the Petface Single Tennis Ball. Presenting an all time favourite, the Tennis Ball is certainly a dog toy must have. Whether you\\\'re playing fetch, hide and seek, keeping your pooch trim or as a reward for training, the Tennis Ball a definite must have. * Pets should be supervised whilst playing with toys. Although Petface toys have been designed to be strong they are not indestructible and will be susceptible to chew damage. The life of a Petface toy depends on the ability and strength of your pet. Monitor for wear and replace if damaged*