ennis balls are great on the tennis court, but somewhere along the way they became the standard toy of fetch time. Ditch the wet, unpleasant tennis balls for a combo pack of natural rubber fetching fun instead with Chew King Fetch Balls. Natural rubber eliminates the chemical smell of synthetic balls, and it's resilient enough to withstand regular play and games of fetch-'till-you-drop. It has an excellent, sporadic bounce to keep your dog guessing, and each Chew King Fetch Ball doubles as a treater with a built-in safety air vent to protect your pup and keep happy tongues from getting stuck. The 3" X-Small balls are great for dogs weighing 40-75 lbs., like your lovable retriever and shepherd breeds.