Horse rearing — when a horse lifts both forelegs off the ground and rises onto its hind legs — is one of the most dangerous behaviours a ridden or led horse can display. A rearing horse that loses its balance and falls backwards can kill or seriously injure its rider, and a ground handler within reach of flailing front hooves faces equally serious risk. Behind the drama, though, rearing is almost always a symptom of something fixable: pain, fear, confusion, or a learned strategy the horse has discovered to get itself out of work. This guide explains why horses rear, how to respond safely in the moment, and how to retrain the habit before it becomes dangerous.
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What Is Horse Rearing?
Rearing is the act of a horse standing on its hind legs with the forelegs lifted off the ground. A small, balanced rear — sometimes called a “levade” in classical dressage — is a controlled, trained movement performed from a collected halt. Unwanted rearing under saddle or in hand is different: it is reactive, unbalanced, and usually accompanied by tension, a hollow back, and an elevated head carriage. Horses rear from a range of motivations, but the shared element is that the horse has decided upward is the only available answer to whatever is being asked of it.
Rearing is listed by the British Horse Society as one of the highest-risk evasions because a horse that topples backwards does so quickly and without warning, leaving a mounted rider almost no time to dismount. Understanding why the behaviour occurs is the first step towards stopping it safely.
Why Horses Rear: Common Causes
Pain and Physical Discomfort
Pain is the single most common trigger for sudden rearing in a previously calm horse. A horse that begins rearing “out of nowhere” is almost always telling you something physical has changed. Common culprits include:
- Ill-fitting tack — a saddle that bridges, pinches the shoulder, or sits on a sore spine will provoke resistance, and some horses go upwards rather than forwards.
- Dental problems — sharp edges, wolf teeth, or retained caps cause sharp bit pain the instant the rider takes up the reins.
- Gastric ulcers — equine gastric ulcer syndrome causes discomfort under girth pressure and during work, and is widely under-diagnosed in sport horses.
- Back pain and kissing spines — kissing spines, sacroiliac strain, or muscle soreness make collection and forward movement intolerable.
- Limb lameness — a subtle forelimb issue can cause a horse to refuse to step forward onto a painful leg, and rearing becomes an escape.
Before treating rearing as a training problem, rule out pain. A vet examination including a ridden assessment, dental check, and saddle fitter review is the starting point for any horse that has begun to rear.
Fear, Anxiety and Confusion
A horse that is genuinely frightened may rear as a flight response when forward escape is blocked. This is common at trailer loading, crossing water, approaching traffic, or in the presence of a specific object. Rearing in this context is driven by adrenaline — the horse is not trying to evade work, it is trying to get away from something it finds threatening. Pressuring a frightened horse forward while simultaneously restricting the head with the reins creates the classic conditions for a rear: forward drive, blocked exit, no option but up.
Poor or Inconsistent Training
Rearing can develop when cues are unclear or contradictory. A rider who asks for forward movement with the leg while simultaneously holding the horse back with the rein is giving two opposing instructions. A confused horse with no clear answer may rear simply because it does not know what else to do. Green horses, or older horses whose training has become patchy, are particularly vulnerable to this pattern.
Learned Evasion
Rearing becomes a habit very quickly. If a horse rears and the rider responds by dismounting, ending the schooling session, or letting the horse return to the field, the horse has learned exactly how to get out of work. This type of rearing is usually deliberate and increasingly confident — the horse goes up earlier, higher, and with less warning each time. Learned rearing is the hardest form to resolve because it is a trained response, and it requires the handler to change the outcome the horse is expecting.
Over-Freshness and Under-Work
A stabled horse on full feed with inadequate turnout or exercise has excess energy and no outlet for it. Rearing, bucking, or napping are all common symptoms of a horse that is physically too fit for the workload it is being given. The fix here is management — more turnout, reduced hard feed, and consistent work — rather than training corrections.
The Dangers of Horse Rearing
Rearing is genuinely life-threatening and should never be treated casually. The specific risks include:
- Falling backwards — a horse that rears too high or is pulled backwards by the rein can topple over. The rider is underneath. Fatal injuries in the UK equestrian community every year are linked directly to backwards falls from a rearing horse.
- Rider ejection — a rider thrown forward during a rear often lands under the horse’s feet as it descends.
- Strike injuries — a handler within reach of the forelegs can be struck in the head, chest, or arm as the horse rises and descends.
- Secondary injury to the horse — a horse that falls backwards can fracture its pelvis, spine, or skull and may not be saveable.
Because the stakes are so high, the appropriate response to repeated rearing is to stop riding and escalate. Continuing to ride a habitually rearing horse without addressing the cause is not brave; it is reckless.
How to Stop Horse Rearing: Prevention and Retraining
Step 1: Rule Out Pain
Book a full veterinary workup: dental examination, saddle fit assessment by a Society of Master Saddlers qualified fitter, and a lameness or back evaluation. Do not attempt to train through rearing until physical causes have been excluded. A bridge lameness or a pinching saddle cannot be “trained out” and the horse is not being naughty.
Step 2: Strengthen Groundwork
A horse that respects its handler on the ground is significantly less likely to rear under saddle. Solid groundwork teaches the horse to yield to pressure, move its feet on cue, and look to the handler for direction. Key exercises include:
- Hindquarter yields — teaching the horse to disengage its hindquarters on a light cue. A horse whose hindquarters are disengaged cannot physically rear.
- Forequarter yields — moving the shoulders away from a light touch teaches the horse to unstick its front end sideways rather than upwards.
- Backing up — a horse that backs softly and straight on request is checking in with the handler and not making its own decisions.
Step 3: Teach and Maintain Forward
Forward movement and rearing are mutually exclusive: a horse cannot rear and move forward at the same time. Every ridden horse should have a clear, immediate response to the leg. If you feel the horse becoming “light in front” — shortening its neck, hollowing, and lightening the forehand — your first action is to send it forward into a circle, a trot, or a bend. Do not pull back; pulling back removes the forward option and invites the rear.
Step 4: Change the Outcome
For a horse that rears as learned evasion, the training fix is to make rearing the harder option and continuing to work the easier one. This is trainer territory: the timing, calm, and release required are difficult for most amateur riders to achieve safely. The goal is that the horse discovers rearing does not end the session and continuing to work does. Done badly, this approach can escalate the behaviour; done well, it extinguishes it.
Step 5: Fix the Management
A horse with adequate turnout, a sensible feeding regime, and consistent work rarely develops the excess energy that fuels explosive behaviour. Review the basics: hours out of the stable, forage-first feeding, companionship, and a workload matched to the horse’s fitness. Many “rearers” improve dramatically with more time in the field and less hard feed.
Emergency Response: What to Do If Your Horse Rears Under Saddle
If you are riding and your horse begins to rear, your priority is to stay on balance and prevent the horse going over backwards. The following sequence is standard BHS-aligned advice:
- Lean forward immediately. Bring your body weight towards the neck. This shifts your centre of gravity forward and helps prevent the horse falling backwards.
- Slip the reins. Loosen the contact. Pulling back on the reins during a rear can pull the horse over.
- Grab mane or neckstrap. A neckstrap is invaluable on any horse known to rear. Hold it rather than the reins during the rear.
- Do not kick or spur during the rear. Adding leg to a vertical horse can cause it to lose balance.
- As soon as the front feet return to the ground, ride forward. Turn the horse sharply onto a small circle to engage its hindquarters and prevent a second rear.
- If the horse feels likely to go over, bail out sideways. Kick your feet free of the stirrups, push away from the saddle, and land clear of the horse.
Always wear a well-fitted, in-date riding hat to PAS 015 or VG1 standard and a body protector when riding a horse with any history of rearing.
What to Do If Your Horse Rears on the Ground
Ground-handling a rearing horse is genuinely dangerous. The forelegs can strike at head height and the horse can come down on top of you. If your horse rears in hand:
- Stay to the side, not in front. Never stand directly ahead of a horse that is threatening to rear.
- Do not pull down on the lead rope. Pulling can unbalance the horse backwards.
- Use a long lead rope with a stud chain or pressure halter if necessary. Distance is safety.
- Disengage the hindquarters. Step towards the hip and ask the horse to yield its quarters across — a disengaged horse cannot rear.
- Turn in small circles. Keep the feet moving and the mind occupied.
- Wear gloves and a hat. Every time. Not negotiable on a horse with any rearing history.
When to Call a Professional Trainer or Vet
Call a professional when:
- The horse has reared more than once and you cannot identify why.
- The rearing is increasing in height, frequency, or confidence.
- You have ruled out pain but the behaviour continues.
- You feel frightened or unsafe on the horse — a scared rider and a learning horse is a dangerous combination.
Look for trainers accredited by the British Horse Society, the Association of British Riding Schools, or professional natural horsemanship organisations. A vet experienced in ridden lameness should be involved if pain has not been conclusively ruled out. Addressing rearing is never embarrassing — it is responsible ownership.
Preventing Rearing Long-Term
Rearing is almost entirely preventable when the basics are right. A horse that is pain-free, correctly trained, well-managed, and confident in its handler rarely rears. The long-term prevention checklist:
- Annual dental checks and saddle fit reviews.
- Adequate daily turnout and forage-led feeding.
- Consistent, forward-led schooling that never traps the horse between leg and hand.
- Handler consistency — the same aids, the same boundaries, every session.
- Regular groundwork to keep the horse reading the handler’s cues even out of the saddle.
- Early intervention — address the first rear, never the tenth.
A horse that feels secure, understood, and correctly ridden becomes a safer and more willing partner. Rearing is solvable, but only if the root cause is identified and the handler is prepared to change the outcome the horse is currently getting from the behaviour.
Frequently Asked Questions
Why is my horse suddenly rearing?
Sudden rearing in a previously well-behaved horse is almost always driven by pain. Dental problems, gastric ulcers, back pain, ill-fitting tack, or subtle lameness are the most common causes. Book a vet examination, a dental check, and a saddle fit assessment before treating the behaviour as a training issue.
Should I pull back on the reins when my horse rears?
No. Pulling back on the reins during a rear can unbalance the horse and cause it to fall backwards onto the rider. Lean forward, slip the reins, and grab mane or a neckstrap. As soon as the front feet touch the ground, ride the horse forward into a small circle.
Is horse rearing dangerous?
Yes — rearing is one of the most dangerous behaviours a horse can display. A horse that falls backwards can kill or seriously injure a rider or handler, and the horse itself can suffer fatal injuries from fractures to the spine, pelvis, or skull. Any horse that has reared repeatedly should be assessed by a vet and a professional trainer.
Can a rearing horse be retrained?
Most rearing horses can be retrained, but the process must start with ruling out pain, then address the trigger — fear, confusion, or learned evasion. Professional retraining is strongly recommended because the timing and consistency required are difficult for amateur handlers to deliver safely.
How do I stop a horse rearing in hand?
Stay to the side of the horse, never in front. Use a long lead rope and wear gloves and a hat. Keep the horse’s feet moving with small circles and hindquarter yields — a horse whose hindquarters are disengaged cannot rear. If the behaviour is habitual, work with a qualified trainer rather than attempting to resolve it alone.
Is rearing always a training problem?
No. Rearing is far more often a pain or management issue than a training issue. Ulcers, kissing spines, dental pain, and poor saddle fit cause far more rearing than disobedience does. Always investigate physical causes first.
