Effortlessly launch tennis balls for your pet with the K-9 Kannon from Hyper Pet. Simply pull back on the loading handle, place the ball in the muzzle and fire. Once your pet retrieves the ball and drops it at your feet, you can reload the ball hands-free by pushing the muzzle down on the ball. Forward of the trigger guard is a convenient holder that secures an extra tennis ball. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Toys.