GoughNut Ball Black - GoughNuts chew toys are designed knowing that safety and fun go hand in hand. Each GoughNuts pet toy has included in it's design the GoughNuts patented safety indicator where Black/Green means "GoughNuts" and Red means "Stop". The GoughNut Ball Black is an interactive toy, not for constant chewing. Our Original GoughNut ring design is the most durable design and should be used for power chewing.