I found a Multipet's pig dog toy on sale for $6.99 on Amazon. If you want to score it even cheaper, just clip the coupon for $2.20 off and check out with Subscribe & Save for up to 5% off. To get the maximum discount, you need to have five or more active subscriptions delivered to the same address in one delivery. You'll pay only $4.44.
Amazon Subscribe & Save allows you to restock this toy just in case your dog destroys it. If you're good for a few months, just pause or cancel your subscription.