Not for power chewers.
935179
This is my fault for purchasing this nylabone w/o thoroughly reading the description. I own a 6 month old American Bully who chewed this in half within an hour. This is definitely not for power chewers.
3683914
These are rock hard and after only giving one of these to my dog for a few minutes, it cracked my dog's tooth and I had to have the tooth extracted.  I think they are probably OK for young dogs with very strong teeth that have a strong need to chew, but I would not advise giving these to an older dog.
2683174
I bought this toy because it said it was for tough chewers and would be hard for them to tear apart.  I gave it to my dog and in LESS than a MINUTE, he had torn the corner off....hmm...not a tough toy at all.  Would not recommend this to any dog that chews.
2332141
I am rating this with only one star because it is unusable.  Within two minutes, our dog was carrying the entire bin throughout the house, as it is made with VERY light plastic.  Within a few more minutes, he had already chewed part of it.  He viewed it as a big chew toy and he was right - it's not well constructed enough to be a toy bin.  I suppose if you have a dog that doesn't like to chew, this would be ok.  It is cute.
4197570
Both my dogs are very heavy chewers. They like to plant themselves down with their toys and sink their teeth as deep as they. This one included. The rubber handles got shredded up quickly. Within a day. There were little orange rubber pieces on the floor and in my dogs poop for days. Eventually had to cut the handles off because my dogs were just eating them. Once the handles were gone, they just started tearing up the middle part. Took it away because I didn't want my dogs swallowing chunks of rubber anymore. Probably good if you don't have aggressive chewers, if you do, stay away.
3842146
Not for aggressive chewers. My pitbull ripped this open and destroyed both balls in under 5 minutes.
2252498
I love the "extreme" level nylabones for powerful chewers, but this one should not have that rating.  My dog was able to separate the little knobs from the red part, creating dangerous choking hazards, or parts that could be ingested and possibly create an obstruction in the digestive tract.  Fortunately, I noticed what was happening and threw this whole thing away before any damage.  DO NOT recommend for powerful chewers.
4142566
My dog tore this up within a couple hours. We had to take it away from him before he started choking on the strings he had ripped apart. It's not good for tough chewers.
899699
Not for puppies or chewers; my dog tore it to shreds within minutes the first time we left in kennel w/him.
1937019
This toy is suppose to be for strong aggressive chewers, but what they dont' warn you is your "aggressive chewer" will tear apart the little detailed paws around the outside in minutes. Rubber everywhere. If you get it, make sure you keep it outside and dont' care if your dog eats some of it (yikes) i know I took it away.
4821523
If you're looking for a ball that will withstand aggressive chewing, this is not it.  My dog destroyed half of it within just a few minutes of me giving it to him.
4110148
I purchased the bully horn based on a recommendation from my sister. Although this bully horn was different I never thought there would be a problem because it said it was all natural and edible. My dog chewed on the horn for 2 days before he ended up at the vet. This item splinters and your dog will eat the pieces. My dog ended up with anal tears. I'm lucky that my dog only ended up with tears. My vet said that this item seems synthetic and could have perforated his intestines. I highly recommend that you think hard before purchasing this item. I read the reviews after my incident and I read that some dogs have no problem. I'm sure these dogs are not actually tearing off pieces. My dog has a very strong mouth and is a powerful chewer. This is not a product suitable for power chewers. I'm sticking with elk antlers going forward.
4818150
I wanted to love this toy. It took my power chewers like 2 minutes to rip these things apart. I wasn't expecting miracles but I was hoping for better. Would only recommend this for dogs that aren't chewers at all!
633590
My dog loves it, but if your dog is a power chewer forget it.  Mine has chewed two of these in half already.
2494367
Toy lasted about 20 minutes before it was completely destroyed by my 7 month old boxer-pit mix pup, and then she attempted swallowing the pieces.  I wouldn't recommend for teething, high-energy pups.
1829710
We thought this product would withstand our 12 lb. dachshund as he destroys toys very easily, but unfortunately he pulled the inside of the toy out within minutes of getting it. Would not recommend for dogs that are avid chewers.
2653972
My 1 year old Leonberger reduced this toy to rags in less than 15 minutes. He raced around with it tossing in the air and enjoying it but it was like squishy bread in his teeth. Clearly not for strong chewers.