This week's show is a distinctly canine affair. John Bradshaw is a fellow at the University of Bristol specialising in anthrozoology: the science of human-animal interactions.
He is also one of the world's leading experts on dog psychology and the author of In Defence of Dogs: Why Dogs Need Our Understanding.
His book uses recent DNA evidence and archaeology to trace the evolution of the dog from wild and threatening wolf to domesticated pooch.
John also discusses dog psychology and the ethics of breeding show dogs from an ever-shrinking canine gene pool.
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