Rogz grinz rogz grinz treat ballthe funniest playful ball under the sun the rogz grinz multi purpose ball with a built in grin available in 3 sizes and 5 stunning colours to suit your active dog and give them a rogz smile as you would expect from the most enjoyed pet brand on planet earth and beyond the rogz grinz is much more than a treat ball of course you can stuff it with treats that your dog will love but the grinz also loves to play bounce and fetch with your pooch and even floats for ea