Vaginal Discharge in a Donkey: Pregnancy, Infection or Reproductive Emergency?

Vaginal discharge in a donkey can come from the vagina, cervix, uterus, urinary tract, or even contaminated skin around the vulva, so the cause is not always obvious from appearance alone. In practice, vets often use equine reproductive principles for donkeys because many of the same emergencies apply. A small amount of clear mucus may be seen around estrus or very late pregnancy, but cloudy, pus-like, bloody, brown, or foul-smelling discharge is more concerning.

In a pregnant jenny, one of the biggest concerns is placentitis, an infection and inflammation of the placenta. In mares, ascending placentitis is associated with mucopurulent vaginal discharge, premature udder development, premature lactation, late-term abortion, premature delivery, and neonatal loss. Because donkeys have a long gestation, often around 12 months and sometimes 11 to 14 months, any discharge during pregnancy deserves prompt veterinary review rather than watchful waiting.

Other possible causes include vaginitis, cervicitis, endometritis or metritis after foaling or abortion, trauma to the reproductive tract, retained fetal membranes, and less commonly contagious reproductive infections. After breeding, some females can also develop uterine inflammation or infection. If the donkey recently foaled, retained placenta is especially urgent because equids can become very sick from metritis, endotoxemia, and laminitis.

Discharge may also be seen with abortion, fetal death, or dystocia. If tissue, membranes, or a hanging placenta are present, treat it as an emergency. Save any expelled fetal membranes or aborted material for your vet if it is safe to do so, because laboratory testing can help identify the cause and protect other animals on the property.

See your vet immediately if your donkey is pregnant or may be pregnant and has vaginal discharge. The same is true for any donkey with bloody discharge, a bad odor, fever, depression, colic signs, straining, weakness, reduced appetite, or discharge plus udder development. These combinations raise concern for placentitis, abortion, uterine infection, or another reproductive emergency.

A donkey that has recently foaled also needs urgent veterinary attention if the placenta is still present or you are not sure it passed completely. In mares, fetal membranes are normally expelled within about 3 hours after parturition, and retention can lead to endometritis, metritis, endotoxemia, peritonitis, and laminitis. Donkeys are managed with the same level of caution because these complications can progress fast.

You may be able to monitor briefly at home only if the donkey is bright, eating, afebrile, not pregnant, not postpartum, and has a tiny amount of clear, non-odorous mucus with no straining or discomfort. Even then, call your vet for guidance, because what looks like mild discharge can actually be urine scald, smegma, or early reproductive disease.

While waiting for your vet, keep the donkey in a clean, quiet area, note the color and amount of discharge, and watch for changes in appetite, manure, temperature, udder development, or signs of foot soreness. Do not put anything into the vagina and do not pull on any hanging membranes.

Your vet will start with a history and physical exam. Helpful details include whether the donkey is pregnant, how far along she may be, whether she recently foaled or aborted, breeding dates, vaccine history, appetite, temperature, and when the discharge started. Your vet will also look for udder development, milk leakage, abdominal discomfort, dehydration, digital pulses, and any signs of systemic illness.

A reproductive workup may include a perineal and vulvar exam, speculum exam, and transrectal or transabdominal ultrasound to assess the uterus, cervix, placenta, fetus, and any retained fluid or membranes. In equine placentitis cases, vets often look for vaginal discharge and increased uteroplacental thickness on ultrasound. Depending on the case, your vet may collect samples for culture, cytology, or PCR testing, especially if abortion or a contagious cause is possible.

Bloodwork can help assess inflammation, infection, dehydration, and organ function. If the donkey has recently foaled, your vet may check for retained placenta, uterine infection, and early laminitis risk. If abortion has occurred, your vet may recommend submitting the fetus and placenta to a diagnostic laboratory because this can identify infectious causes and guide herd-level biosecurity.

Treatment depends on the cause. Options may include anti-inflammatory medication, carefully selected antimicrobials, uterine therapy, oxytocin in postpartum cases, fluid support, hoof monitoring, and close pregnancy monitoring. In high-risk pregnancies, your vet may recommend repeat ultrasounds and more intensive observation over the following days to weeks.

Home care should support, not replace, veterinary care. Keep your donkey in a clean, dry, quiet area with easy access to water and hay, and reduce stress as much as possible. If she is pregnant or recently foaled, separate her from unnecessary activity and monitor her closely several times a day.

Check and record the amount, color, and smell of the discharge, along with appetite, manure output, rectal temperature if you can safely obtain it, and any udder changes. Watch for new signs such as pawing, rolling, depression, foot soreness, reluctance to move, or a hanging placenta. Photos can help your vet compare changes over time.

Gently clean the outside of the vulva only if discharge is soiling the skin, using warm water and a soft cloth. Do not scrub, douche, insert anything into the vagina, or apply over-the-counter creams unless your vet specifically recommends them. Do not give leftover antibiotics or reproductive drugs without veterinary direction.

If abortion or placental passage occurs, keep dogs and other animals away from the material and call your vet right away. If safe, save the placenta or fetal tissues in a clean bag or container and keep them cool, not frozen, until your vet advises next steps. This can be important for diagnosis and herd protection.