SNIP Yet “personal protection dogs” like Cassidy are bought, sold and trained every day in the UK. At the top end of the market, purpose-bred animals trained to bite, hold and release on command are sold for tens of thousands of pounds, marketed as family pets that double as live-in security solutions. Demand for these dogs, once the preserve of the ultra-rich and security professionals, seems to be growing, fuelled by celebrity endorsements, social media and widespread anxieties about crime. This is also a largely unregulated corner of dog ownership, raising difficult questions about public safety, animal welfare and where...