A horse that "isn't moving well" is one of the most common reasons to call the vet. Sometimes it's a stone in the hoof that's easily removed, sometimes it's an injury with months of recovery behind it. This guide helps you recognize an irregular gait, work out which leg is sore, and judge how urgent it is. The diagnosis itself always belongs with the vet.
What Lameness Is
Lameness isn't a condition in itself, but a sign that movement hurts or isn't going smoothly on a mechanical level. The horse redistributes its weight to relieve a sore leg, and that shows up as an uneven gait. The pain can be anywhere in the leg: in the hoof, a tendon, a ligament, a joint, or higher up in the shoulder or pelvis.
As a rider or owner, it's rarely possible to determine the exact cause in the moment — and you don't need to. Your job is to notice that the horse isn't moving evenly, work out which leg is involved, and judge how serious it is. The rest is work for the vet.
Finding the Sore Leg
A horse lightens a leg by bearing weight on it for less time or less heavily. That's best seen at the trot on hard, flat ground, moving straight toward you and away from you, with the horse led in hand (not under saddle). Have someone else lead so you can watch properly.
- Front leg. Watch the head. The horse raises its head when the sore front leg lands, and drops its head onto the sound leg. That up-and-down movement is called the head bob: head up on the sore leg. A memory aid is "down on sound" — the head drops on the healthy leg.
- Hind leg. Watch the hips. The hip on the sore side often rises higher (known as a hip hike) because the horse bears weight on that leg for a shorter time. Hind-leg lameness is harder to see than front-leg lameness; many people confuse it with the other side.
Lameness is usually clearest at the trot, because the horse alternates its weight on diagonal leg pairs. At the walk, mild lameness is sometimes barely visible; at the canter, the horse often hides it. On a circle (on the lunge, for example), the inside legs carry more weight, which is exactly what makes some injuries stand out.
| What you see | Likely side |
|---|---|
| Head rises as the front leg lands | That front leg |
| Head drops (bob) | The sound front leg |
| One hip hikes higher | That hind leg |
| Shorter stride, "tiptoeing" on hard ground | Often hoof-related, both front legs |
| Worse on the circle than on the straight | Often the inside legs |
Judging the Severity
Not every irregularity is an emergency, but never underestimate an acute, obvious lameness. A handy (unofficial) way to describe the degree when you call the vet:
- Mild — only visible at the trot, or only on the circle or on hard ground. The horse still bears full weight on the leg.
- Moderate — clearly visible at the trot on any surface, and sometimes already at the walk.
- Severe — the horse will barely or won't bear weight on the leg at all, hobbles at the walk, or stands with the leg drawn up.
Also feel and look for accompanying signs: heat in a joint or tendon, swelling, an obvious wound, a strong pulse in the hoof (throbbing arteries above the hoof), or a pain response to touch. A horse that suddenly won't put a leg down could just as easily have a simple hoof abscess as a fracture — you can't tell the difference yourself, so that combination should always be looked at.
Common Causes
For orientation, not as a diagnosis. The range of possible causes is wide, and only examination shows what it actually is:
- Hoof abscess. One of the most common causes of sudden, severe lameness. The leg can look badly injured, but as soon as the pressure is relieved (the farrier or vet opens it up), the horse often bounces back quickly.
- Stone bruise or bruising in the hoof. Sometimes clears up on its own, sometimes leaves a sensitive sole after work on hard or stony ground.
- Tendon or ligament injury. Heat and swelling on the back of the cannon bone, often after a misstep, slippery footing, or overexertion. Requires rest and patience — recovery takes weeks to months.
- Joint problems. Ranging from acute inflammation to wear (arthritis) in older or heavily worked horses. Often stiff at the start of work, sometimes looser after warming up.
- Laminitis. Inflammation in the hoof — not "ordinary" lameness but an emergency; see below.
When to Call the Vet Right Away
Call without delay, the same day or immediately, for:
- Sudden, severe lameness where the horse won't or can barely bear weight on the leg. Don't keep working it and don't "walk it out."
- Heat, significant swelling, or a wound at or in a joint. Inflammation in a joint can cause permanent damage.
- Signs of laminitis: the horse stands rocked back with its weight on its hind legs, moves stiffly, and the hooves feel warm with a throbbing pulse. This is an emergency, not something to watch for a day.
- Lameness with fever, lethargy, or refusing to eat — there may be more going on than a local problem.
With mild, short-lived irregularity and no heat or swelling, you can give the horse a few days' rest and watch how it develops. If it doesn't improve quickly, comes back, or you're not sure — call anyway. Phone advice is usually free and can save you from a worse injury.
What to Do (and Not Do) Until Help Arrives
Your role is to keep the horse calm and not make the situation worse, not to treat it yourself.
- Stop riding and working the horse. Continuing to ride a lame horse makes almost any injury worse.
- Put the horse in a stall or a small, safe space with flat, not-too-hard footing, so it stays quiet instead of galloping around the pasture.
- Don't give painkillers on your own initiative. These mask the pain, causing the horse to load the leg more heavily and making it harder for the vet to judge the severity. Only on the vet's instruction.
- Feel the whole leg and compare it with the other leg: heat, swelling, a pain response, a throbbing pulse above the hoof. Note what you find.
- Bring in your farrier (the specialist who trims and shoes the horse's hooves). With a suspected abscess or hoof problem, the farrier is often the first to help; if there's doubt about the cause, the vet is and remains the right source.
- Note when and during what it started — after a competition, a jump, out in the pasture — and consider filming the horse at the trot. That helps with the assessment.
In Short
Have a horse that isn't moving evenly trotted up on hard, flat ground and watch for the head bob (head up on the sore front leg) or the hip hike on a hind leg. Judge the severity by how much weight the horse puts on the leg and whether there's heat, swelling, or a wound. Stop working the horse and give it rest. Call right away for sudden severe lameness, for heat or swelling around a joint, and for signs of laminitis. For diagnosis and treatment, the vet is the only correct source — if in doubt, call once too early rather than too late.
See also: Recognizing Colic and Other Emergencies in Horses · Hoof Care and the Farrier · Glossary terms