My in-laws have always had labradors (greedy devils - the dogs, not the in-laws). One year one of them found her way into the bedroom where the freshly iced Christmas cake was and licked half the icing off!

No pet has ever wrecked as much havoc as my brother in law, who one year popped a champagne cork at the table instead of easing it off. It flew up to the ceiling, broke the light fitting, and glass rained down in everyone's dinner!