Among goat breeds, the so-called 'wooden-legged goats' stand out. These animals suffer from a hereditary condition — congenital myotonia, which causes sudden muscle tension and temporary immobility when frightened. In reality, the goats do not lose consciousness — their muscles simply become completely tense for 5–20 seconds.
Myotonia is associated with a disruption in the transmission of nerve impulses to the muscles. When an animal's fight or flight response is triggered, the muscles tense up and do not relax, which can cause the goat to fall. The severity of the symptoms varies: young individuals are more likely to fall, while adults are already able to maintain their balance.
The gene that causes the condition is recessive, making the breed unique and not found outside of North America. These goats were first described in the 1880s on a farm in Tennessee. Due to their muscular characteristics, they are poor climbers on slopes, which makes them convenient for keeping and primarily contributes to their use in meat production.
The condition does not cause pain to the animals and does not harm their health, so their 'fainting' remains just a humorous trait that brings a smile.
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