Stringhalt in Donkeys: Sudden Hindlimb Jerking, Nerve Signs & Management

Stringhalt is a gait abnormality seen in equids where a hindlimb lifts with exaggerated flexion, sometimes sharply toward the belly, then comes back down quickly. It may affect one hind leg or both. Signs are often easiest to see at the walk and may become more obvious when a donkey turns tightly, backs up, or first starts moving after standing.

Although most published veterinary information focuses on horses, the same movement pattern can occur in donkeys because the condition involves the hindlimb nerves and muscles rather than a horse-specific body system. In affected equids, veterinary sources describe changes consistent with peripheral neuropathy involving nerves such as the sciatic, tibial, and peroneal nerves.

Stringhalt can range from mild and intermittent to severe enough to interfere with normal movement, hoof care, or safe handling. Some donkeys may seem bright and comfortable but move abnormally. Others may have muscle loss over the hindquarters, difficulty placing the foot normally, or signs that worsen with excitement, cold weather, or exercise.

This condition is not something to diagnose at home. A jerky hindlimb can also be caused by hoof pain, hock problems, trauma, or other neurologic disease. Your vet can help sort out what is most likely in your donkey and what level of care fits the situation.

Veterinary references describe stringhalt as a neuromuscular or neurologic gait disorder rather than a single disease with one proven cause. In equids, lesions consistent with peripheral neuropathy have been identified in affected animals, especially involving the sciatic, tibial, and peroneal nerves. That helps explain the sudden over-flexion of the hindlimb.

There are two broad patterns described in horses and likely relevant to donkeys as well. One is a more isolated or classical form, often affecting one hindlimb. The exact cause is often unclear, but trauma, local pain, or other neurologic disease may play a role. The other is a bilateral or pasture-associated form, often called Australian stringhalt, which affects both hindlimbs and has been linked to toxic plant exposure.

Plants associated with pasture-related stringhalt include flatweed or false dandelion, and some reports also mention sweet pea toxicity in the United States. Risk appears higher on poor, overgrazed, or dried-out pasture where animals are more likely to consume weeds. Not every exposed animal is affected, and the exact toxin has not been fully confirmed.

A stringhalt-like gait can also happen secondarily from painful foot lesions or irritation lower in the limb. That is one reason your vet will usually look beyond the gait itself before deciding the movement pattern is true stringhalt.

Diagnosis starts with a careful history and movement exam. Your vet will watch your donkey walk, turn, and often back up, because stringhalt is commonly most obvious in those situations. In many equids, the characteristic gait pattern is the main clue. Your vet may also ask about recent pasture conditions, weed exposure, hoof trimming, trauma, and whether other animals on the property have similar signs.

A full physical and neurologic exam helps your vet decide whether the problem is most consistent with stringhalt or another cause of hindlimb dysfunction. Hoof pain, hock arthritis, abscesses, trauma, and other neurologic disorders can mimic or worsen a jerky gait. Depending on the findings, your vet may recommend hoof evaluation, flexion tests, bloodwork, or referral for a more advanced lameness or neurologic workup.

Electromyography, or EMG, can support the diagnosis by documenting abnormal muscle and nerve activity, but it is not required in every case. Advanced testing is usually reserved for unclear, severe, or non-improving cases, or when surgery is being considered.

Because donkeys can hide discomfort and may show subtler signs than horses, video of the gait at home can be very helpful. If it is safe, record your donkey walking away, toward the camera, turning, and backing, then share that with your vet.

Prevention focuses most on the pasture-associated form. Keep donkeys off poor, overgrazed, or drought-stressed pasture where weeds become a larger part of what they eat. Walk fields regularly and ask your vet or local extension service for help identifying flatweed or false dandelion, sweet pea, and other concerning plants in your area.

Good forage management matters. Provide adequate hay when pasture quality drops, avoid forcing donkeys to graze sparse weedy areas, and improve pasture density through reseeding, rotation, and weed control where appropriate. If one equid on the property develops suspected pasture-related stringhalt, it is wise to review turnout for the whole group.

Not every case can be prevented. The isolated form of stringhalt does not have one proven cause, so there is no guaranteed way to stop it from happening. Still, prompt attention to hoof pain, limb injuries, and new gait changes may help your vet identify treatable problems before the movement abnormality becomes more established.

If your donkey has had stringhalt before, ask your vet for a long-term management plan. That may include pasture review, regular hoof care, safe footing, and guidance on what changes should trigger a recheck.