All our dogs love this particular chew toy. We had a mastiff that chewed infrequently and they lasted about 6 months. We now have a pit bull puppy and they last a week. One caution...with strong chewers you must supervise and not let your dog swallow the larger chunks. We have never had a problem with the small pieces they eat, but do watch out if your dog chews these up quickly because they will pull of larger (1/4 to 1/2 inch) size pieces, which requires monitoring if your pup eats the pieces as ours does.