I thought this was under a dental chew toy but it is extremely hard, none chewing hard plastic. My dog can’t chew on them at all. He can pack them around but that’s it.I found these to be a bit large for our small and medium dogs. I was curious to try a larger bone with a different texture to see if they would be receptive to this style of chew toys but overall I think they were just a tad large.However, the quality is still fantastic and I have no doubts a larger dog that is more of an aggressive chewer would love these. This is a two piece set that includes one all plastic bone that sort of resembles a severed spine. Interesting choice for a dog chew toy, but nonetheless it has plenty of surface area to gnaw on.Second one is a more traditional shaped bone with a twist - the middle section is more of a rubbery material with nubs on it. So you get a few different textures here and it looks like it would be a decent dental aid as well.Overall, they aren't for my dogs but I'll definitely pass them along to friends with larger dogs and let them enjoy the chewy goodness!The DHR Dog Chew Toys are an excellent size for medium to large dogs. But, size isn’t everything when it comes to a destructive chewer.Unfortunately, the nylon and rubber have no scent that is attractive to the dogs. When presented to the dogs, the bones only received a sniff. We persisted introducing them until one dog reluctantly took, and then immediately dropped it. The dogs are completely disinterested. The lack of taste and scent are a failure. To this day, the bones see no action unless prompted by us with embedded treats.It would appear that, in order for the chews to hold the dogs’ attention, imbedding treats in them are a must.I’m personally looking for self-entertaining toys to keep aggressive chewers busy without the ‘must have’ treat element included. These toys, while durable in appearance, aren’t going to keep the dogs interested unless I make sure they do (by adding treats to them).As a result, I can’t even speak to their durability because they don’t hold the dogs’ interest long enough to be chewed up.Not a toy I’d recommend for aggressive chewers that you are trying to keep entertained and away from belongings that you are trying to protect. When you have a truly aggressive chewer, you need toys that attract them automatically without the need for intervention. So, I’m still looking for the ultimate, durable, self-entertaining toys for my dogs that are the destructible aggressive chewer type.I have a great dane, german shepherd, and a shepherd mix who all chew on these toys. While they all love them, and try to hoard the toys from each other, they do not stand up well to chewing. Compared to the similar type from nylabone, these look like my few month old nylabone after just a few days. Price wise is comparable to name brand, so it really comes down to the type of chewer your dog is and how often you want to replace toys.Got these for my Mom's destructive Bassett pup....hopefully these are more enticing than furniture..these will fit her big mouth and should hold up!right out of the box, they enjoyed it. happy dog, happy dog ownerThese are good toys to keep in your pet's living area. She likes to hide the brown 'spine' in the couch, and she likes to carry the bone and rubber into her kennel with her. These are easy to maintain, and we've only had to file down peels once since we received them--that gets them a five-star review for all the abuse they've taken!Would definitely recommend for aggressive or heavy chewers.