We used to have a terrier who would "kill" all pet store toys in less then 10 minutes. Then he wanted nothing to do with the toy... we found these pentapulls 8-9 years ago, and they are the best. Our dog could still "kill" them but it would take awhile as there are 5 squeekers and the heavy nylon.
Now we have a new puppy, and again we will give him pentapulls. Thanks.