It is very sad, but can be prevented. I realize not all dogs will stop chewing when told to, however, if watched and made sure they are properly chewed, they are completely fine! Just like any dog chew, toy, treat, etc. It needs to be made sure it's properly chewed before eating.

I guess the sudden outbreak in so many incidents involving Greenies is their increasing popularity over the years, bound to happen to every consumer product out there I suppose.