# Morgan horse weight and height, and why an easy keeper needs watching

> Morgan horse weight and height from eXtension and Oklahoma State, daily hay by body weight, and Merck guidance on insulin dysregulation and laminitis.

Canonical: https://lucernel.com/guides/horse-breeds/morgan
Last updated: 2026-10-08

Morgans are compact, 14.2 to 15.2 hands and about 1,000 pounds, and the Merck Veterinary Manual names the breed among those most affected by equine metabolic syndrome and the laminitis that follows it.

**A Morgan weighs 900 to 1,100 pounds and stands 14.2 to 15.2 hands.** eXtension gives 14.2 to 15.2 hands (58 to 62 inches) and 900 to 1,100 pounds (408 to 499 kg), and Oklahoma State University gives the same height range. Virginia Cooperative Extension says about 15 hands and about 1,000 pounds. (eXtension Horses, Oklahoma State University and Virginia Cooperative Extension)

| Source | Height | Weight |
| --- | --- | --- |
| eXtension Horses | 14.2 to 15.2 hands | 900 to 1,100 lb |
| Oklahoma State University | 14.2 to 15.2 hands, some over or under | Not given |
| Virginia Cooperative Extension | About 15 hands | About 1,000 lb |

The sources agree closely on both measures.

## A small foundation, a steady size

Oklahoma State writes that present day Morgans differ little from their foundation sire, a bay stallion that stood just over 14 hands. The size has stayed compact, and so has the appetite. Merck lists some Morgans among the easy keepers, horses that maintain weight on about 0.03 Mcal of digestible energy per kilogram of body weight a day, against 0.04 for hard keepers such as Thoroughbreds.

## Daily hay for a 1,000 pound Morgan

For an easy keeper the lower lines are a normal starting point, not a diet. The arithmetic uses 1,000 pounds, the middle of eXtension’s range.

Merck’s starting point for a healthy adult is 2 to 2.5% of body weight in feed dry matter a day, at least half of it forage, and 1.5% for an obese horse, with a warning that severe restriction can be harmful. These figures are our arithmetic from 1,000 lb, counting hay as 90% dry matter (Merck gives 88 to 90%).

Merck’s plan for a horse with metabolic syndrome at body condition 5 of 9 is 2% of body weight, 20 pounds at this weight, in 4 to 6 small meals or a slow feeder, and 1.5% for an obese horse, 15 pounds. It also warns against severe restriction and says weight loss diets should not fall below 1.25%, so any plan under 2% belongs with your vet.

- 1.5% of body weight: 15 lb (7 kg) of dry matter, about 17 lb (8 kg) of hay
- 2% of body weight: 20 lb (9 kg) of dry matter, about 22 lb (10 kg) of hay
- 2.5% of body weight: 25 lb (11 kg) of dry matter, about 28 lb (13 kg) of hay

## A weight tape example for a Morgan

The horse weight calculator uses the adult equation in the Merck Veterinary Manual: heart girth squared times body length, in inches, divided by 330, gives pounds. A heart girth of 70 inches and a body length of 67 inches gives 70 x 70 = 4,900, times 67 = 328,300, divided by 330 = about 995 lb (451 kg). Those measurements are our illustration of the formula, not a real horse.

Merck notes the equation slightly underestimates real weight and that a scale is the only exact method, so measure the same way each time to keep the trend reliable.

## Insulin dysregulation and laminitis

Merck says equine metabolic syndrome, whose core feature is insulin dysregulation, raises the risk of hyperinsulinemia associated laminitis, and that this type makes up about 90% of laminitis cases in horses generally. It lists Morgans, ponies, Saddlebreds, Tennessee Walking Horses, Paso Finos and Mustangs as the types in which the syndrome is most common, and says prevention comes down to a sound diet and a normal weight, especially in high risk breeds.

## What laminitis looks like

Merck calls severe lameness with bounding digital pulses the hallmark sign, usually in both front feet. The first 72 hours after the signs begin are the acute phase, before the coffin bone moves within the hoof, so a Morgan with severe lameness and bounding pulses is an emergency call to your vet, not a wait and see.

## Hoof schedule

Merck advises trimming at intervals of 4 to 8 weeks. The University of Minnesota suggests every 6 to 8 weeks in summer and 6 to 12 in winter, when hooves grow more slowly. Putting the dates in a calendar keeps a metabolically sensitive horse’s feet in view.

## Body condition

Merck targets 4 to 6 on the 9 point scale. The University of Georgia table says that at 6, fat begins to be deposited along the neck, withers and shoulder, and that by 7 it is clearly deposited along the neck. Feel the neck and shoulder monthly as well as the ribs, and note the score beside the tape estimate.

## Frequently asked questions

### How much does a Morgan horse weigh?

eXtension gives 900 to 1,100 pounds (408 to 499 kg) and Virginia Cooperative Extension says about 1,000 pounds.

### How much does a Morgan eat a day?

For a 1,000 pound horse, 2% of body weight is 20 pounds of dry matter, about 22 pounds of hay, and 1.5% is 15 pounds, about 17 pounds of hay. Merck gives 2 to 2.5% for a healthy adult and 1.5% for an obese one. These figures are our arithmetic.

### Can a Morgan carry a 180 pound rider?

The University of Minnesota gives about 20% of ideal bodyweight, rider and tack included, as a comfortable load for an average adult light riding horse. For 1,000 pounds that is about 200 pounds, so a 180 pound rider with 20 pounds of tack is at the limit.

### Are Morgans prone to laminitis?

Merck lists Morgans among the types in which equine metabolic syndrome is most common, and the syndrome raises the risk of laminitis. Keeping a healthy weight and watching for lameness are the main protections, with your vet guiding any test or diet change.

## Sources (checked 2026-10-02)

- [eXtension Horses, Light Horse Breed: Morgan](https://horses.extension.org/light-horse-breed-morgan/)
- [Oklahoma State University, Breeds of Livestock: Morgan Horses](https://breeds.okstate.edu/horses/morgan-horses)
- [Virginia Cooperative Extension, Horseless Horse Project Unit 2 (4H-931)](https://www.pubs.ext.vt.edu/content/dam/pubs_ext_vt_edu/406/406-105/4H-931.pdf)
- [Merck Veterinary Manual, Equine Metabolic Syndrome](https://www.merckvetmanual.com/metabolic-disorders/equine-metabolic-syndrome/equine-metabolic-syndrome)
- [Merck Veterinary Manual, Laminitis in Horses](https://www.merckvetmanual.com/musculoskeletal-system/disorders-of-the-foot-in-horses/laminitis-in-horses)
- [Merck Veterinary Manual, Nutritional Requirements of Horses and Other Equids](https://www.merckvetmanual.com/management-and-nutrition/nutrition-horses/nutritional-requirements-of-horses-and-other-equids)
- [Merck Veterinary Manual, Feeding Practices in Horses and Other Equids](https://www.merckvetmanual.com/management-and-nutrition/nutrition-horses/feeding-practices-in-horses-and-other-equids)
- [Merck Veterinary Manual, Foot Care of Horses](https://www.merckvetmanual.com/management-and-nutrition/preventative-health-care-and-husbandry-of-horses/foot-care-of-horses)
- [University of Minnesota Extension, Caring for your horse’s hooves](https://extension.umn.edu/agriculture/animals-and-livestock/horse/caring-for-your-horses-hooves)
- [University of Georgia Extension, Feeding strategies for peak performance in horses (B 1365)](https://fieldreport.caes.uga.edu/publications/B1365/feeding-strategies-for-peak-performance-in-horses/)
- [University of Minnesota Extension, Guidelines for weight-carrying capacity of horses](https://extension.umn.edu/agriculture/animals-and-livestock/horse/guidelines-for-weight-carrying-capacity-of-horses)