The Chuckit®Sniff™ Ball 4 Pack includes 2 Bacon & 2 Peanut Butter Chuckit Sniff Balls. Infused with a bacon or peanut butter scent, that will excite more than 100 million scent receptors in your dog's nose. Attracts a dog to it with its mouth-watering scents, making it easier for your dog to find during games of fetch. Made from the same durable natural rubber with an extra thick core that Chuckit! fans have come to love. Designed for high bounce, buoyancy, and durability. The Sniff Fetch Ball is compatible with medium Chuckit! launchers Catch the Scent with Chuckit's Bacon Sniff Fetch Ball.