This is more of an update. Our GSD/Lab and lab/Pitt are obsessive power chewers that can kill toys within minutes to a week. The "indestructible" Kong extreme lasted a couple of weeks, this donut has lasted 4 months so far. Yes, there is damage but 4 months of obsessive chewing, anything will start to break down. I bought them another one.
I generally don't write reviews, but I had to let other dog owners know this black ring is the ONLY toy my dog didn't chew up!! I tried so many toys rated for "aggressive chewers", but this is the only one she still has in tact, and she's had it for several months now. No cracks, no punctures, no damage at all. [...]
I have a 2yo, 95lb pitbull who shreds toys in seconds! Before purchasing this item I had tried nearly every kind of “indestructible” toy (even the largest black Kong toys) only to be disappointed when there were tiny bits of rubber all over the place in a few minutes/hours. However, we have had this toy for one week now and there are only minor tooth indentations. I am very impressed with the durability and would recommend it for anyone with a power chewer!
— Brenli W.