IgorPartola parent
Don't remember where I read it at least 12 years ago, but someone talked about an April Fools prank where they released three pigs in their high school, with numbers 1, 2, and 4 written on them. Allegedly the administrators spent weeks looking for number 3.
The "weeks looking for number 3" part sounds apocryphal to me.
Snopes [0] has one real example and one television example of this prank. In the real example, the students were caught on camera, and there was no long search for the remaining livestock.
Thanks for actually researching this. As I remember, I read this bash.org, so I was pretty skeptical of the story just because of the source. It's one of those stories I'd like to believe was true just because I like it.
That's the version from 20 years ago. Those people have grown up and become school administrators, so it doesn't work as well anymore. The new plan is to release pigs numbered 1,2, 5,6,7, 10 and -2.