Hi, I'm new here. I stumbled across the forum a little while ago and have done some lurking. Now I have a question. My 7 month old puppy is quite the escape artist and learned how to open her cage. We put a lock with a key on the latch to keep it shut. We have been keeping the key in the lock, thinking she wouldn't be able to turn the key. Today, when I went to get her out of her cage, the key was missing, and just the little silver chain was sitting inside her cage. I'm afraid she somehow knocked the key loose and ate it because I can't find it anywhere. Any thoughts on whether she will just pass it, if she ate it. Could the key be made from a toxic metal? Could it cause serious injury? The key was silver.