My pup is a huge chewer! She’s so methodical in her destruction that she’ll chew the black kongs into tiny pieces. I typically only buy her nylabones and kongs. But I had someone at a small privately owned pet store tell me about GoughNuts. They are a tougher rubber than kongs, and guaranteed by the manufacturer! So far she hasn’t made a dent in her goughnut (it’s been 3 months!) and LOVES it more than any other toy! They are a little pricey in comparison to kongs at Petsmart or Petco etc, but once you break through the first layer of rubber, you only pay for the shipping back to the manufacturer to have it replaced for a BRAND NEW toy. By far the best toy investment for anyone with a Pit!