Playback serverIf a title won’t play, switch servers.
Season 7 · Episode 10
0.0April 23, 1986
About once a month in America, pet dogs will kill - usually either a child or an old person. What makes man's best friend unleash the behaviour of his pack-hunting ancestors? Animal psychologists are trying to pin down what releases canine aggression. And now they even offer psychotherapy to cure the bad dog's hang-ups.