KONG Blue. Blue kongs are 25% stronger than red kongs! Blue KONGs are made out of a special Radiopaque rubber that is X-RAYABLE in case your dog somehow happens to swallow a piece of the rubber.
KONG Blue is the strongest rubber dog chew toy available today. Made from a newly reformulated rubber, this blue kong puncture resistant and gives even the strongest chewers a healthy workout. KONG Blue’s center can be filled with treats or food to keep your dog busy for a long time. Vet’s recommend KONG toys to help relieve stress, boredom and provide playful exercise.
No dog toy is indestructible. Supervise your dog’s use of KONG toys until you are confident they can be used without supervision.