The Staffie-cross bull terrier is the weapon of choice for London street thugs. The seats of childrens' swings in the local parks bear deep toothmarks and tears, and the lower branches of trees are torn where both these things have been used to 'train' the dogs in aggression and attack. These are not devoted companion animals, not man's best friend, but brutally and ignorantly treated creatures who have only ever known curses and blows. The animal charities' pens are full of these dogs, rejected and thrown out as not aggressive enough, but no one wants to re-home them and take the risk. Quietly, they are euthanised as they are found.