It's a rule in my house; Rally will take a cooked bone, even a huge roast or ham bone, and break it into chunks and share it out and then all the dogs are puking up bone chunks. Great fun.

I've seen the ring around the jaw thing 2 or 3 times; when you slice a big bone like a femur into 2-3" chunks so they can get all the marrow out, they can get the edge of that snagged behind their lower canine teeth and then they freak out and can't figure out how to get it back off.