We got a 9-month-old rescue JRT a couple of weeks ago, and unlike any dog we've had before, he adores toys. His favourites are anything tuggy, and I splashed out on a dental Kong on a rope thing, thinking it would last. Two days later he'd shredded the rope to buggery. I've had terriers for over 30 years, but I'm a bit of a toy novice. What can I get that will survive a good chewy play?