Very interesting for the dog
Excellent toy, you can fill it both inside and just on the outside (between the grooves), it keeps your pet busy for a while and cleans their teeth at the same time. You can throw it, roll it, hide it... I use it as a reward, a habit, or just for fun.
The only downside is that for my dog (border collie), the teeth in the grooves are a bit soft, and since we use it every evening, one sometimes comes off, so it only lasts a few months (4-5-6 months).
But it’s still one of his favourites.