We love the Orca Donut- survived 2 danes throughout puppy teething and still going strong: https://www.amazon.com/Orka-Tire-Rubber-Fetch-Petstages/dp/B003V734IO/ref=sr_1_1?ie=UTF8&qid=1505239338&sr=8-1&keywords=dog+toy+Orka

we also have had luck with ropes and the 5 dollar pigs from Walmart. The 5 dollar pigs don't last too long, but they are on the cheaper end and really love them.