Recommended for extreme chewers! "Virtually Indestructible"... many companies claim it, but GoughNuts guarantees it. Each Goughnut is equipped with a built-in safety indicator: if your dog chews through to the inner red core, it's time to take the toy away and either send it back for a free replacement or discard it (they're recyclable!). Understanding leverages that are presentÂ in a dog's jaws and relying on 60 years of rubber technology has resulted in an indestructible toy! (Dogs who are capable of getting through the toy may be asked to be tracked for our ongoing plan for improvement). Put it to the test! *this an extremely durable toy and will generally last a very long time. Goughnuts will replace any toy that has the red core showing. We recommend knowing your dog's chewing habits before leaving them alone with any toys!