I worked at one of the off site Airport car parks while a student and they had a failed police dog, a German Shepherd - a certifiable psychopath, yer XL bullies had nothing on him - that they'd let run about at night to deter the local scallywags from Linwood taking too keen an interest in working out how to scale the perimeter fence. One of the old boys that was a shift manager would go down to its kennel after dark and w**k it off once a week when he was on the night shift. He was the only guy on site whose throat was safe from being ripped out in the dead of night.