KONG Extreme Dog Toy The KONG Extreme dog toy represents the most durable strength of KONG rubber. Designed for the toughest of chewers, the KONG Extreme offers enrichment and helps satisfy dogs’ instinctual needs. The unique, ultra-durable, all-natural rubber formula is designed for determined chewers, while the erratic bounce fulfills a dog’s need to play. Want to extend play time? Be sure to stuff with tempting bits of kibble and entice with a dash of peanut butter. Add to the fun by adding KONG Snacks and top with KONG Easy Treat. Stuff and freeze for a longer-lasting challenge. Features: Mentally stimulating toy, offering enrichment by helping satisfy dogs’ instinctual needs KONG ultra-strong and durable black rubber formula for powerful chewers Offering enrichment by helping satisfy dogs’ instinctual needs Unpredictable bounce for games of fetch Great for stuffing with KONG Easy Treat, Snacks, or Ziggies Recommended worldwide by veterinarians, trainers, and dog enthusiasts All-natural rubber Made in the USA with globally sourced materials Freeze with your dog’s favorite tastes for extended play Item Specifications: Sizes: Small: 6.5″ x 4.0″ x 1.8″ Recommended for dogs up to 20 lb. Medium: 6.5″ x 4.0″ x 2.3″ Recommended for dogs up to 35 lb. Original (Large): 8.5″ x 5.5″ x 2.8″ Recommended for dogs up to 65 lb. X-Large: 8.5″ x 5.5″ x 2.8″ Recommended for dogs up to 90 lb. XX-Large (Ultra): 9.5″ x 6.0″ x 3.9″ Recommended for dogs over 85 lb.