GoughNuts virtually indestructible chew toys are perfect for Extreme chewers. Made in the USA of all natural rubber with a patented red inner safety indicator. When the red shows, send the toy in for a free replacement. New Pro 50 line, for the toughest of chewers. Designed for aggressive chewers, power chewers, and dogs of all sizes, these durable USA-made chew toys are perfect for satisfying your pet’s natural instinct to chew while promoting healthy teeth and gums.