Cathy Hoyt and her husband adopted a golden retriever named Duke 18 months ago. They had been warned about his strange tendency to take and guard household items, but nothing prepared them for the reality of it. Duke has stolen a teapot, a laptop, a book and more. And dog experts are stumped. “It’s strange in this case because the object isn’t much of a resource to the animal; it’s just an arbitrary object,” said Clive Wynne, a professor of psychology and director of the Canine Science Collabora