Most horses need 1.5–2% of their body weight in forage daily — about 15–20 pounds of hay for a 1,000-pound horse — plus grain only if workload or condition requires extra calories.
Working Out Forage Amount
Start with body weight (a weight tape gives a reasonable estimate if you don’t have a scale), then calculate 1.5–2% of that number in pounds of hay per day. A horse in harder work, cold weather, or struggling to maintain weight may need the higher end of that range or more; an easy keeper on good pasture may need less supplemental hay.
When Grain Is Actually Needed
If a horse can’t maintain a healthy weight on forage alone — visible ribs, poor topline, dull coat — additional calories from grain or a higher-fat feed may be needed. Horses in light trail or pleasure riding often don’t need grain at all if forage quality is good.
Signs You’re Overfeeding
A cresty neck, fat pads near the tailhead, and general obesity are signs of overfeeding, and carry real health risk — overweight horses are at higher risk for laminitis and metabolic disease. A body condition score of 5 out of 9 is generally the target for most horses.
Signs You’re Underfeeding
Visible ribs and spine, a sunken look behind the shoulders, and low energy are signs a horse needs more calories — either more forage, added fat, or a higher-calorie feed, depending on the cause.
For a deeper look at forage quality and feed types, see our full Horses Nutrition & Feeding Guide.
Starting Point: Body Weight and Forage
The baseline rule is roughly 1.5-2% of body weight per day in forage — for a 1,000-lb horse, that’s about 15-20 lbs of hay or equivalent pasture daily. This should be split across multiple feedings rather than one or two large meals, since horses are designed for near-continuous grazing and long gaps between forage access increase colic and ulcer risk.
Adjusting for Workload
An idle or lightly worked horse often needs forage plus a ration balancer and little else. A horse in moderate work (riding several times a week) typically needs some added concentrate calories on top of forage. Heavy work — regular training, competition, or physical labor — pushes caloric needs up further, sometimes requiring feeding 2-3 times daily to meet energy needs without overloading the digestive system in one sitting.
Using Body Condition, Not Just a Formula
Body condition scoring (assessing fat cover over the ribs, neck crease, and tailhead on a 1-9 scale) is more reliable than following a generic feeding chart, since individual metabolism varies enormously. Check body condition every few weeks and adjust — increase if ribs are becoming easily visible and prominent, decrease if a crest is forming on the neck or fat is accumulating at the tailhead.
Common Feeding Mistakes
Feeding by scoop rather than weight (a scoop of pellets and a scoop of a denser feed can have very different actual weights), skipping the vet or nutritionist consult for a horse with a health condition, and increasing grain instead of forage first when a horse needs more calories are all avoidable missteps. Forage-first is almost always the safer and more natural approach to adding calories.
Sample Feeding Breakdown
For a 1,000-lb horse in light work: roughly 15-18 lbs of hay split across 2-3 feedings, plus a ration balancer per label directions, is often sufficient. For the same horse in heavy work: hay intake stays similar or increases slightly, with 4-8 lbs of a concentrate feed added, split across 2-3 meals to avoid overloading the digestive system at once. These are starting points, not fixed prescriptions — always adjust to the individual horse’s actual body condition.
Free-Choice vs. Measured Hay
Free-choice hay (available essentially all the time) mimics natural grazing behavior and works well for many horses, particularly those prone to ulcers from long gaps without forage. Easy keepers prone to obesity often need measured hay portions instead, sometimes using a slow-feeder hay net to extend eating time without increasing total intake.
Feeding Around Exercise
Avoid feeding a large grain meal immediately before hard exercise — allow at least an hour, ideally more, to reduce digestive stress and colic risk. Light hay access before and after exercise is generally fine and even beneficial for gut health.
When Feeding Amounts Need Professional Input
Pregnant or nursing mares, growing horses, horses recovering from illness or injury, and those with diagnosed metabolic conditions all have feeding needs that go beyond generic guidelines — these situations genuinely warrant a vet or equine nutritionist’s input rather than estimating from a standard chart.
Weighing Feed Instead of Scooping
Different feeds have different densities — a coffee-can scoop of pellets and the same scoop of a lighter textured feed can differ by a pound or more. A simple hanging or kitchen scale, used to weigh a typical scoop once and calibrate from there, removes this guesswork and keeps feeding consistent day to day.
Adjusting Through the Year
Caloric needs commonly rise in cold weather (maintaining body heat costs energy) and can shift with changes in daylight-driven activity level and pasture availability. Reassessing body condition each season, not just once a year, catches these needs before a horse visibly loses or gains too much weight.
Common Signs You’re Feeding Too Much or Too Little
Overfeeding often shows up first as excess energy and harder-to-manage behavior under saddle, along with gradual weight gain and a cresty neck. Underfeeding shows up as visible rib and hip bones, a dull coat, reduced energy, and in some cases increased anxiety or food-focused behavior. Both directions are correctable once identified — the key is checking body condition regularly enough to catch the drift before it becomes significant.
Coordinating Feeding Across Multiple Caretakers
If more than one person feeds your horse — a boarding barn’s staff, a friend covering for you — write down exact amounts and timing clearly and post it where whoever’s feeding can see it. Verbal instructions get lost or altered over time, and inconsistent feeding amounts are a preventable source of both weight problems and digestive upset.
A Practical Monitoring Routine
Set a recurring reminder — every 2-4 weeks — to do a body condition check and briefly note it somewhere you’ll actually see it again. This small habit, repeated consistently, catches feeding issues months before they’d become obvious from casual daily observation alone, where slow weight changes are notoriously easy to miss simply because you see the horse every day.
What to Do When You’re Unsure
If you’re genuinely uncertain whether your horse’s weight and feeding program are on track, a quick photo sent to your vet, or a body condition assessment during a routine visit, resolves the uncertainty far faster and more reliably than continued self-diagnosis from online charts and photos of other horses.
Special Situations: Layup, Illness, and Recovery
A horse on stall rest for injury recovery needs significantly reduced calories compared to its normal working ration, since reduced movement means reduced caloric burn — continuing a full working ration during layup is a common cause of unwanted weight gain and excess energy in a horse that’s supposed to be resting. Conversely, a horse recovering from illness or in active rehabilitation may need calorie-dense, easily digestible feed to rebuild condition. Always follow your vet’s specific guidance during these periods rather than defaulting to standard feeding charts.
Feeding Multiple Times a Day vs. Fewer Large Meals
Horses’ stomachs are relatively small relative to their body size and produce acid continuously, which is part of why frequent smaller meals (or free-choice forage) suit their digestive physiology better than one or two large meals. If your schedule only allows twice-daily feeding, prioritizing forage that lasts between feedings — a slow-feeder hay net, for example — helps bridge the gap more naturally than concentrate alone ever could.
Recordkeeping That Actually Helps
A simple log noting feed type, amount, and any body condition observations, updated even briefly every few weeks, becomes genuinely useful over months and years — spotting a slow drift in weight is far easier with recorded data points than relying on memory of what a horse looked like some months back.
Final Thoughts on Getting Feeding Right
Feeding a horse correctly is less about finding one perfect formula and more about consistent observation and willingness to adjust as your horse’s needs change through seasons, workload, and age. Owners who check in regularly and adjust gradually, rather than setting a feeding plan once and never revisiting it, keep their horses in noticeably better condition over the years.
One More Consideration: Trusting the Process
Getting feeding exactly right takes a season or two of observation and adjustment for any new horse-owner pairing. Give yourself permission to make small adjustments along the way rather than expecting to get it perfect immediately — this is normal, and most experienced owners are still fine-tuning years into ownership.
A Closing Thought
When genuinely unsure, involve your vet rather than guessing indefinitely — feeding mistakes are common but also among the most fixable issues in horse care once identified.
More Horses Guides
FAQ
Ribs that are easily visible with no fat cover, a prominent spine, and a sunken area behind the shoulder are signs of being underweight — a body condition score chart helps standardize the assessment.
Yes — excess grain, especially high-starch feed, is linked to weight gain, laminitis risk, and behavioral issues like excitability. Grain should match actual calorie need, not habit.
Often yes — horses need more forage in cold weather to generate body heat through digestion, and less rich grass access in spring if prone to metabolic issues.
