Sending in the dogs doesn't always work...
At some POW camp in the war, the Russian prisoners in one particular hut were having a riot. Rather than risk any of his men, the German commander instructed that the dogs should be sent in.
3 rather unpleasant Alsatians were bundled through the door. Much woofing and yelling followed, then a couple of yelps before one came racing out with its tail between it legs and eyes bulging in fright.
Its colleagues were the first fresh meat the Russians had received since they'd been there...