There's nothing as useful as the truth, in terms of ruining anyone's day, week, month, year, decade, or life… Unless, of course, you own a remotely operated automatic flamethrower-drone-tower and have some marinated pork-chops on your person, to lure unsuspecting dogs in close proximity to it, but since dogs don’t really have lives - by using this specific method of torture, you can only improve the remaining few seconds of their existence.