They were intentionally chewing on glass the little stinkers! Now granted, they are 100+ lb dogs, and this teeny amount would probably pass, but it still made me nervous. Just in case I called Mike to bring over some bread for them. In case you were unaware, when a dog eats something sharp like this, feed them bread. It cushions it as it passes through. He runs it over and I give them each a big piece because I wasn't sure who did the eating. They were excited and took the bread, but didn't know what to do with it. There were guilty faces and confused looks. I had to break it up into pieces to get them to understand that it was food. These two dogs! They keep me on my toes!