Hah! Back before we were married we bought MrsT's mum a small glass octopus. She showed it to her execrable Boston Terrorist, which immediately leapt at it and knocked it out of her hands, naturally breaking bits off. We were then compelled to crawl round retrieving small lobster-red bits of glass in case the wretched animal ate one and croaked.
I think that was the only dog I ever detested, and it was only like that because she teased the life out of it. It was eventually put down for biting too many people.