Other than having to re-thread the rope a couple of times, this is one of my dog's favorite 'toss' toys. He loves to shake it like crazy when he brings it back to be thrown again, and will play with this for HOURS!! It really worked well in some of the deep snowfalls we've had, as it didn't sink into the snow; pretty much landed and stayed on top of snow, so easy for him to chase and retrieve - didn't lose any in deep snow, like with smaller balls. I bought 3 of them - one for outside (can get as muddy/dirty as he likes), one for indoors and I keep one in the car, so we can play wherever he needs to burn off some energy. If the rope does get shredded, easy to replace - he hasn't been able to breach the surface of the ball. Plenty of teeth marks, but no holes. I have the 6" size for my 50# Belgian Tervuren, 15 months old.

My female german shepherd loves this ball. She has covered it with tooth marks but it keeps on going.