For the chickens in choppers?
No, what rooster described happened. Allegedly anyways. "Old" army story anyways. Aussie military had a flight sim for the Apache. Someone replaced the sprites (pictures but moving) of infantry with kangaroos for local color. Only, they JUST replaced the visuals. Not the weapons. Specifically, NOT the man er, 'roo portable anti-aircraft weapons. Said Apache in the sim was thus blown out of the sky.
Not sure of the details, but it's standard lore in both the coding community as well as the military.