A prison in the Brazilian state of Santa Cantarina recently replaced its guard dogs with a flock of geese that supposedly make loud noises when they detect strange noises, like someone trying to escape.
In this day and age, prison complexes feature state-of-the-art detection systems that make it very difficult for inmates to escape undetected. Still, regardless of technological advancements, it’s always a good idea to have a backup analog detection system as well, in case the sophisticated stuff fails. Human guardians and guard dogs are usually the norm, but some prisons use some unlikely alternatives. For example, several prisons in Brazil have replaced guard dogs with geese, which they say are not only just as effective, if not more so, but also cheaper to maintain. Apparently, geese have very good hearing and will make loud noises whenever they detect strange noises, thus alerting the human guards.
