That would be during a time of a full erection, obviously Some stallions may even have a penis about 36 inches long. What is the maximum length of a horse penis It depends on the horse Big stallions are probably about 32 inches. The stallion's penis flares during mating to ensure that semen stays inside the mare's vagina and therefore increase the chance of siring a foal
If a horse has a penis that is flared or swollen, it may be infected It is best to take the horse to a licensed veterinarian to diagnose the issue Flare is the term for the ridge at.
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