Horse Body Condition Score Chart: Henneke 1-9, Too Thin or Too Fat

Horse body condition score chart: what the Henneke scale measures

A horse body condition score chart rates how much fat a horse carries on a scale of 1 to 9, where 1 is emaciated and 9 is extremely fat. Most adult horses are healthiest between 4 and 6, and a 5 (ribs easy to feel but not see, back level) is the usual target.

The Henneke body condition score system was developed by Don Henneke at Texas A&M University and published in 1983. You look at and feel six places where horses store fat: the neck, withers, loin (back), tailhead, ribs and the area behind the shoulder. Our anatomy guide shows where each one is.

The scale works reasonably well across breeds, though build matters: Thoroughbreds often have sharper withers than Arabians, and Quarter Horses tend to carry more flesh over the hips.

Why the Henneke scale is in the news

This month, the scale landed in real arguments:

• Sand Wash Basin, Colorado. The Bureau of Land Management's (BLM) daily gather reports for Sept. 21 and 22 list all the animals gathered those days as a Henneke 4 to 5. A mustang sanctuary pointed to those numbers to argue that the horses aren't being removed because they're starving. BLM says the gather addresses overpopulation on drought-strained range.
• Fifteenmile, Wyoming. BLM's report on the gather that ended Sept. 18 lists 12 deaths, all classified as pre-existing or chronic, including a 13-year-old stallion euthanized with a Henneke score of 2.

Owners are checking their own horses, too. In drought-hit areas hay is scarce and pricey heading into winter, and sugary fall grass raises laminitis risk for easy keepers.

The Henneke scale 1-9, score by score

Half points, such as 5.5 or 7.5, are normal when a horse falls between two descriptions.

How to body condition score your horse in 6 steps

1. Stand the horse square on level ground and look from the side and behind.
2. Use a flat hand and real pressure. University of Kentucky equine specialist Bob Coleman describes it as firm but gentle, like a massage therapist's touch.
3. Ribs. Run your fingers across the rib cage. At a 5 you can't see ribs but can feel them easily; at an 8 they're hard to find.
4. Behind the shoulder and withers. At a 5 they blend smoothly; fat pads appear from 6 and fill in flush by 8. Some breeds, such as Thoroughbreds, naturally have sharper withers, so don't mark a horse down for bone structure alone.
5. Loin and tailhead. Along the spine, a ridge means thin, level is a 5, and a gutter means fleshy or fat. At the tailhead, prominent bones mean 3 or lower, spongy fat is about a 5, soft fat points to 6 or higher, and bulging fat to a 9.
6. Neck. At a 5 the neck blends into the shoulder; at an 8 it's noticeably thick.

Score each area, add the six numbers and divide by six. Log it with the date and a photo; grooming time is a natural moment (see our grooming guide).

Rescore monthly, not daily. A horse can gain up to 3 pounds a day, but moving up one score takes a gain of about 35 to 44 pounds on a 1,100-pound horse, says equine nutritionist Clair Thunes, and on a typical feeding plan that takes weeks to months.

Traps that throw off a score

• Winter coats hide thin horses. University of Maine Extension warns a thick coat can hide a thin horse, and without extra energy in winter, horses can starve. Trust your hands over your eyes.
• The belly isn't on the chart. A round barrel, including a pregnant mare's, doesn't count as fat by itself.
• Fat isn't fitness. The score measures fat, not muscle. The Equine Endocrinology Group (EEG) lists topline muscle loss in older horses as a sign of PPID (Cushing's disease).
• A hard crest is a warning at any score. Fat on the crest and tailhead is among the signs the EEG links to insulin dysregulation, which raises laminitis risk.

Weight tape math

A weight gives you a number to track and to budget hay, about 2% of body weight a day. For adult light horses, the standard equation is:

Weight (lb) = heart girth (in) × heart girth (in) × body length (in) ÷ 330

Measure the girth just behind the elbow and withers, and the length from the point of the shoulder to the point of the buttock. A 72-inch girth and a 66-inch length works out to about 1,037 pounds; the monthly trend matters more than the exact number.

Is a body condition score of 5 good?

Yes. A 5 is the target for most adult horses: enough fat for an energy reserve, not so much that it strains hooves, joints and metabolism. University of Maine Extension calls 5 the suggested optimum, and 4 to 6 is the healthy band for most horses.

Coleman notes research in which horses below 4 or above 6 tired sooner. Mares at 3 or below can develop hormone imbalances and have trouble getting in foal.

So what does a 4 or 5 mean for a mustang? On the chart it sits inside the healthy band: a little lean at 4, ideal at 5. The chart can't settle the bigger question BLM and advocates are arguing about: whether drought-hit range can keep supporting a herd that BLM counts at well over its target size.

How to tell if a horse is too thin

A horse is too thin at a score of 3 or below. By then it has almost no fat in reserve, and University of Maine Extension notes the body starts breaking down muscle for energy.

Common causes include too little forage or poor hay (a real risk where drought has cut this year's hay supply), bad teeth, parasites, being pushed off the feeder by herdmates, cold weather and illness, including PPID.

What to do:

1. Call your vet first for a horse at 3 or lower, or one losing weight while eating well. An exam can find disease that more feed won't fix.
2. Check teeth and parasites with a dental exam and a fecal egg count.
3. Feed more good forage first. Specialists quoted by The Horse suggest good-quality hay free choice, then richer add-ins such as alfalfa, beet pulp or rice bran, with concentrates split into at least three meals instead of two. Make every change gradually. Our nutrition guide covers the basics.
4. Be patient. It can take a couple of months to bring back an underweight horse, and longer from a 1 or 2.

A score of 1 or 2 is an emergency

A starved horse can die of refeeding syndrome if it gets too much feed too fast, so a veterinarian should set the plan. Every point counts: a University of Tennessee study of starved horses found survival was 14.6 times more likely for each full point higher on the scale. If a horse that isn't yours looks like a 1 or 2, report it to local animal control.

Too fat: why scores of 7 to 9 matter this fall

Overweight is common, too. Some studies suggest up to 54% of domestic horses are overweight or obese, and University of Maine Extension notes fat horses tire sooner and are more prone to colic and laminitis.

Fall raises the stakes: sunny days and cold nights load grass with sugar, and University of Minnesota Extension lists overweight easy keepers, ponies, horses with metabolic syndrome and horses that have foundered before as the most susceptible.

A safe weight-loss plan:

• Aim for about one score a month. That's the pace experts quoted by The Horse recommend; the EEG notes reaching a 5 can take several months.
• Cut hay, don't crash-diet. University of Minnesota equine specialist Krishona Martinson suggests hay at 1.75% of body weight, never below 1.5%. For a 1,000-pound horse, that's 17.5 pounds a day, with 15 as the floor. A stricter diet, such as for a horse with equine metabolic syndrome (EMS), should be set by your vet.
• Go gradually. The EEG advises lowering intake slowly and avoiding stress to limit the risk of hyperlipemia, a serious blood-fat disorder.
• Drop grain and treats, and limit grass with a dry lot or grazing muzzle. A slow feeder keeps the horse from going without food for long stretches.
• Add exercise, unless the horse has laminitis.

What to do now: a fall body condition checklist

• Score every horse this week and log it with a photo.
• Rescore monthly through spring.
• Thin horses: reach at least a 5 before the cold; horses living out through hard winters do better at 6 to 7.
• Easy keepers: feel the crest and tailhead after every frost and sunny spell.
• Seniors: watch the topline, and ask about PPID testing if an older horse loses muscle or sheds late.

When to call the vet

• Any score of 3 or below, or weight dropping fast
• Weight loss in a horse that's eating well
• A hard, cresty neck with a sore, short stride
• A score of 1 or 2: call the same day

More warning signs are in health basics and our care guide.

What to watch next

• BLM's Sand Wash Basin gather page, whose daily reports have included Henneke scores.
• Hay prices as stored hay runs down this winter.
• The first hard frosts, high-risk days for easy keepers on grass.