The curios story of ZIB.
On September 1951, during the Soviet Union’s sub-orbital rocket travel experiments with dogs, just days before her flight, a test dog named Bolik (Болик) ran away from base, taking all the weeks of training and preparation with her. The soviet scientists, undeterred (and scared of their superiors) decided to look for a quick replacement, finding it in an unnamed street dog that kept roaming the base, and according to the military personnel, was very friendly.
Still without telling their superiors, the scientist named the dog ZIB (a Russian acronym for “Substitute for Missing Bolik”, “Замена Исчезнувшему Болику” Zamena Ischeznuvshemu Boliku) and put her in the rocket intended for Bolik with no training whatsoever, making a successful flight, and for her troubles, earning the best sausages the scientist could afford.
After the flight the truth was revealed, and while surprised, the director of the program accepted the scientist’s decision, and made sure that both ZIB’s name and history was put in the records of the program, going as far as to report it to the Politburo.