Dog Toy Fetch Medley Balls The Fetch Medley is a refreshed assortment of the best-selling Fetch Medley. It includes a Strato Ball, an Erratic Ball with squared corners to keep the bounce trajectory changing and an Ultra Squeaker Ball, a classic rubber ball with a squeak! This 3-pack of replacement balls are made of high-quality materials and designed especially for the game of fetch. Three Unique Specialty Balls Use with Ball Launchers Whistler, Max Glow, Rebounce Balls Available in Small and Medium sizes.