Perhaps the closest parallel to Stalin's secret police in Animal Farm are the dogs, taken from their mother while they were still puppies, and reared to be killers by Napoleon. When Napoleon decides to drive Snowball from the farm, he uses the dogs to do so. Later, in Chapter VII, he uses the dogs to carry out the systematic murders of the animals that are accused of collusion with Snowball. The parallel with Stalin's purges is obvious, and it was Stalin's secret police, known as the NKVD, that carried out those arrests, deportations, and murders. Several of the animals who have questioned Napoleon's policies, or who confess to disloyalty, are brutally mutilated by the dogs in public.