Penis Bleeding in Swine

By Lambert Vet Supply | 1/1/2017 | Posted to Swine
Penis Bleeding in Swine

This is a relatively common condition, the boar at mating passes fresh blood into the vagina.

Symptoms in the Boar

  • Blood around vulva post service.
  • Blood in semen.
  • Blood around the prepuce and skin.
  • No generalized illness.
  • Sudden onset.
  • Hemorrhage only occurs at mating.

Related Article: Navel Bleeding/Pale Pig Syndrome >>

Causes & Contributing factors

  • Damaged penis.
  • Ulceration of the urethra.
  • Hemorrhage from accessory glands.
  • Hemorrhage from the preputial sac.
  • Trauma to the penis from sows or boars in outdoor mating.


This is made from the clinical symptoms.


  • Rest the boar for 3 weeks.
  • Treat with a broad spectrum antibiotic for 5 days.
  • Treat with a broad spectrum antibiotic for 5 days.
  • If it reoccurs, cull the boar.

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