You can purchase additional inserts for your Bonus Bungee Stuffer Tug (sold separately) if you want to experiment to see what your dog likes best:

• Soft bite: luxury foam for your very soft-mouthed dogs and smaller dogs, 1.5" wide bite area

• Medium bite: open-cell foam that's offers just a bit more resistance and a 1.5" wide bite area

• Firm bite (but not hard): high-density, closed-cell foam for dogs that really want to chomp into something; 1.5" wide bite area