four years ago. now on bbc news, panorama. tonight — inside the world of extreme dog breeders. bulldogs of all shapes and sizes are loved by celebrities and the public alike. now, unscrupulous dealers are cashing in. this is a business that's purely driven by profit, not taking into account the welfare of the dogs. we go undercover to expose animal cruelty... who thinks, "i know — "let's breed a dog whose legs are round the wrong way"?