Equine Nutrition and Health Services Blog

My Horse is Gaining Weight on Free Choice Forage! Why Isn't it Working?

July 26, 2016
Dr. Gill is in full agreement with Dr. Getty’s assessment of how to handle obesity in horses.  Limiting hay and using anti grazing devices such as muzzles is not in the best long term interest of the horse! Please read the following blog entry to understand how to best handle over weight horses from both physiological and psychological standpoint.

My Horse is Gaining Weight on Free Choice Forage! Why Isn't it Working? 

By Juliet M. Getty, Ph.D.
True, gradual weight loss can be achieved by creating an environment that allows horses to eat and behave in sync with their normal instincts. Hormones such as insulin, cortisol, and leptin are in homeostasis, where the body achieves a state of equilibrium and performs as it should.
It starts with making the horse feel safe. The foundation of safety is knowing that there is always something to eat. Without this, the very underpinning of health becomes unhinged. Piling supplements and expensive feeds onto this insecure footing will make a trivial, insignificant, and short-term difference.
A steady, never-ending supply of appropriate hay/pasture will allow your horse to realize that he can eat effortlessly. In very little time, he will begin to self-regulate his forage intake and eat only what his body needs to maintain condition.
There are cases, however, where the horse not only doesn’t self-regulate, he actually gets heavier. Why is this? And if this is your horse, is there no hope? Do you simply have to go back to restricting hay? There are several reasons why this can occur and no, you do not and should not go back to restricting hay.
Free-choice forage is fundamental but it is not enough
If you are expecting to simply give your horse all the hay he wants and he’ll start to miraculously lose weight, while his nutrient intake remains inadequate and there are significant stressors in his life, you will likely be disappointed. Free-choice forage feeding will, however, improve his behavior and digestive health, even without weight loss. But to have an impact on his weight, other practices need to be in place.
Four components should be considered
An excellent diet, stress reduction, the right environment, and patience are key ingredients to making weight loss a reality. Below are factors that can make this happen. I realize that for many of you, it is not feasible to implement all of them. My goal is to give you the ideal situation; your goal needs to be to come as close to the ideal as possible. Even making some of these changes will improve your horse’s health.
1. Excellent Diet
Appropriate forage
The hay and/or pasture need to be low in sugar and starch, as well as low in calories, because your horse will be eating a lot of it. Testing your hay is critically important. If Ethanol Soluble Carbohydrates (ESC) + Starch exceeds 11% on a dry matter basis, you’ll want to seriously consider soaking it.[i] If the hay supply changes frequently where your horse is boarded, consider buying your own hay; even a one month’s supply is worth testing.
Pasture grazing, of course, is ideal, but it can be tricky because its sugar and starch content varies so much. It, too, is worth testing periodically at the best and worst times of the day.[ii] The ideal is a pasture with a mix of healthful forage. Many horses can lose weight while pasture grazing in such conditions; it is the most natural, least stressful state for the horse, and provides the most nutritious whole food.
Aggressively attack inflammation
Where there’s body fat, there’s inflammation, leading to insulin and leptin resistance. A vicious cycle ensues because leptin resistance prevents the brain from telling the horse that he’s had enough to eat, and insulin resistance tells the horse to hold on to body fat. In both of these situations, body fat increases, further exacerbating inflammation.
To effectively reduce inflammation, boost the diet with antioxidants, anti-inflammatory herbs, key minerals, and the right balance of omega 3s to 6s, preferably from supplements that provide wholesome ingredients without the use of added preservatives. Please review articles[iii] in my website’s library for specific ways to accomplish this.
Get rid of the concentrates
Supplements can be added to a small amount of a carrier feed such as hay pellets, non-GMO beet pulp, or whole foods (avoid soy). But do not feed large amounts of any “grain” including those that contain cereal grains (oats, corn, barley, rice, etc.), molasses, or added vegetable oils; these do nothing except add unnecessary calories.
2. Stress Reduction
Forage restriction is incredibly stressful
The horse’s digestive tract is designed for a continual flow of forage; without it, the horse will be in physical pain, mental discomfort, and prone toward a hormonal response that destroys health and promotes obesity.[iv] If he runs out of forage, even for a few minutes, your horse’s system will register this as an impending famine and his body will hoard fat.
The damage from prolonged forage restriction can be difficult to repair
The only way to fix your horse is to help him return to his natural state. However, the longer a horse lives as an overweight, stressed animal, the more inflammation he will have within his system, making it difficult it to bring that horse back to a normal weight, free of leptin or insulin resistance. Years of enduring forage restriction will definitely take its toll. But the solution is not to continue down this destructive path; the solution is to try to make things better.[v]
Grazing muzzles may defeat your purpose
If your horse tolerates a grazing muzzle, it can allow him to spend some time out on pasture with his buddies. But a muzzle can defeat your purpose if it causes frustration and its attendant cascade of stress-induced hormonal reactions. So pay attention to your horse. Even if he accepts the muzzle, limit its use to no more than 3 hours per day. Muzzles are hardly ideal—they do not really allow sufficient forage consumption for healthy digestive functioning, but the benefits of exercise and companionship in the pasture can outweigh the downside of short term reduction in forage intake. Make certain that your horse can drink water and that water drains well.
3. The Right Environment
Movement is so important
Movement does more than burn calories; it keeps your horse whole, physically and psychologically. Confinement to a small paddock (even though it is outdoors), or worse, to a stall, for hours on end, reduces circulation, increases the horse’s sense of vulnerability, increases susceptibility to depression, creates inflammation throughout the body, decreases the metabolic rate, reduces immune function, and depresses digestive tract motility, to name only a few outcomes. All of these have the same impact on your horse’s weight – they can lead to obesity because of the hormonal and metabolic responses that tell the horse to hold on to body fat.
Freedom to roam and interact with other horses
Horses require the protection of a herd. They are also social animals and need the interaction of close physical contact; merely seeing other horses over the fence is not enough.
Room to roam, along with freedom to choose whether to be out in the sunlight, or under a tree, or in a shed -- perceiving he has options for comfort and safety is a calming force for the horse.
Slow feeders can be wonderful when used correctly
Slow feeders come in a variety of styles and methods.[vi] Allow your horse to gradually become accustomed to eating from them by also providing loose hay. Feeders need to be kept full at all times, the hole size for netted styles should not be smaller than 1.5 inches, and, depending on design, they should be kept low or on the ground to simulate the horse’s natural eating stance. Provide many of them throughout his area to encourage grazing.
4. Patience!
At first, he will overeat
Give a horse all he can eat, and at first he will overeat, a lot! It can be difficult to watch. Be sure you’ve tested your hay and it is suitable. Then give him more than he could possibly eat so that there is some left over. If you don’t give him enough and he eats it all, you will not accomplish your goal. But if he has so much that he can’t finish it, and he can leave and return to find it still there, he will eventually reach the magic moment – he will walk away! Eventually, he will eat far less than he did at the beginning.
Many barn managers are not willing to do this because it seems like a waste of money. But in actuality, the horse will eat less once he self-regulates than he did when he was only getting a set ration of hay.
Give it enough time. Most horses start to self-regulate within a couple of weeks. Some take a couple of months. And those who are leptin resistant take even longer.
Sometimes it’s gas, not fat
Forage contains large amounts of fiber, which is fermented in the horse’s hind gut (cecum and large colon), resulting in gas formation. This is normal and healthy, but it can make your horse look pregnant. This is not fat; it’s gas--otherwise known as a “hay belly.” Do not let it concern you. Your horse will adjust. If it gets excessive, however, it would be best to help out the microbial flora in the hind gut by administering a good prebiotic.[vii]
Horses will gain weight at first
Overeating naturally leads to weight gain. But it is only temporary. Allow for movement, feed an anti-inflammatory diet, get rid of stress, and you will have a different horse.
Abandon the conventional weight loss mantra!
“Eat less!” This continues to be spouted by many horse owners and equine professionals. In fact, equine research in this area has revolved around reducing forage, often with “positive” results. But it is exceedingly short-sighted! What they don’t tell you is how those same horses are doing a year later. Nor do they examine the inflammatory, metabolic, endocrine, physiologic, and even hypothalamic damage in the brain that results from forage restriction.[viii]
We know about the damage this causes to humans. Why do we use this method with horses? Excessively reducing calories will result in weight loss. But wait! Give it some time and the weight not only creeps back but even more weight is put on. Recently, the New York Times did a piece on the “Greatest Losers,[ix]” a reality TV show where overweight men and women underwent extreme dieting and exercise and were praised by all in their efforts as they showed off their newly trim selves. Six years later, they were back to where they started, or worse, due to a shift in normal metabolism.
It is no different for horses. Prolonged forage restriction ultimately resets the metabolic rate to a slower level. In addition, the body’s hormonal response changes, making it very difficult for the horse to successfully keep off the weight without sacrificing health and quality of life.
Bottom line
Why not simply allow your horse to be healthy? Weight loss the wrong way will ensure that your horse will get fat again. Being patient, reducing inflammation and stress, and creating a healthy environment will do the trick. Sure, take away calories from concentrated feeds – that’s fine. But never, never restrict forage.

[i] For easy soaking combined with slow feeding, consider the Porta-Grazer Soaker/Feeder:http://gettyequinenutrition.biz/products/portagrazer.htm
[ii] Getty, J.M. Testing your pasture – For peace of mind. http://gettyequinenutrition.biz/Library/testingyourpastureforpeaceofmind.htm
[iii] Getty, J.M. Three articles: Obesity. The real cause. The real fix; PPID progression can be slowed down; and The overweight horse who won’t stop eating. Leptin resistance is the key! Available in the Library at www.gettyequinenutrition.com
[iv] Getty, J.M. Restricting Forage Is Incredibly Stressful http://gettyequinenutrition.biz/library/restrictingforageisincrediblystressful.htm
[v] Getty, J.M. Can the damaged insulin-resistant horse be fixed?http://gettyequinenutrition.biz/Library/Canthedamagedinsulinresistanthorsebefixed.htm
[vi] Slow feeders are offered on Dr. Getty’s Free Shipping Store: http://horsesupplements.gettyequinenutrition.biz/slowfeeders.html
[vii] Ration Plus is a worthwhile prebiotic for changes in hay consumption: http://gettyequinenutrition.biz/ration_plus/ration_plus.htm
[viii] Getty, J.M., Equine Digestion – It’s Decidedly Differenthttp://gettyequinenutrition.biz/TeleSeminars/TeleseminarBooks/SpotlightonEquineNutritionTeleseminarSeries.htm. This book will empower you with the understanding of why the horse’s digestive tract requires a steady, non-stop flow of forage.
[ix] The New York Times, 2016. After “The Biggest Loser,” Their Bodies Fought to Regain Weight.http://www.nytimes.com/2016/05/02/health/biggest-loser-weight-loss.html?emc=eta1&_r=0


This article can be found on line athttp://gettyequinenutrition.biz/libary/myhorseisgainingweightonfreechoiceforage.htm

Permission to reprint this article is granted, provided attribution is given to Juliet M. Getty, Ph.D. No editorial changes may be made without her permission. Dr. Getty appreciates being notified of any publication: gettyequinenutrition@gmail.com
For other articles, click on Library at www.GettyEquineNutrition.com

Importance of Forage

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Forage is the base of the equine diet.  No horse can survive without forage, and all horses must consume at least 1% but preferably at least 2% of their body weight every day.

Forages come in many forms: long stemmed, cubed pelleted and chopped, but the best way to feet it to horses is long stemmed.  Horses need to chew forage for many reasons, including mental and behavioral health, dental health, increased saliva production to help prevent ulcers and most of all, excellent quality nutrition...

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Back to the Basics

December 1, 2015

What Every Horse Needs, Period.

by Juliet M. Getty, Ph.D.

The horse world is cluttered with feeds, supplements, and remedies all promising a better, “new and improved” horse. While many such products do in fact improve horses’ health and condition, there are certain basics that every horse needs, regardless of breed, age, condition, or purpose. Even seasonal or regional changes do not alter these foundational principles.

Water is the most important nutrient

It must be plentiful, clean, and ...

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OmegaTri and the Equine - Reducing Inflammation, Restoring Balance

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OmegaTri oil is different from the oil prod...
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Muzzle, Stall or Dry Lot?

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Amy M Gill, PhD

We all have had at least one or two horses that cannot be left to free range on pasture due to risk of laminitis or colic, seem to gain weight while barely eating anything and are clearly metabolically challenged and may have Cushing’s disease, impaired glucose metabolism and/or insulin resistance.  Trying to manage these horses on turn out can be a nightmare, especially if you live in an area where...

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September 3, 2013

As we head into fall, it’s time to plan for changes in the nutritional needs of your horses and those of the pastures they have been grazing.  After a long hot summer, many pastures become overgrazed, over run with weeds and possibly contain toxic plants.  If there has been insufficient rainfall in your area, the entire pasture may be in poor condition. At this point, not much nutrition is available from the pasture for the horses grazing it, so alterations to their daily rations must be co...

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Is Botulism a Serious Threat to my Horse?

August 12, 2013

A review of what causes botulism and how to prevent it.

What Causes Botulism?

Botulism is caused by toxins produced by the bacterium Clostridium botulinum.  Horses can consume the bacterial spores from soil and feedstuffs.  Most often it is found in forage where an animal carcass has been baled with the forage. Botulism can also gain entry through wounds.

What are the signs of a horse that is affected?

Botulism causes a paralysis of the motor nerves that are responsible for muscle movement....

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Slow feeding….What it Means for the Health of Your Horse.

July 12, 2013

Though it’s not really anyone’s fault per se, today’s modern horse keeping practices have unfortunately forced horses  into sedentary lifestyles where free ranging and getting plenty of exercise foraging for foodstuffs has essentially become a thing of the past.  To compound the problem of too little exercise, many horses are often fed excessive amounts of concentrated rations and high calorie, nutrient dense forages. Horses have evolved by nature to store energy (fat) and nutrients in ...
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Equine Immunity: How Nutrition Can Improve Immune Response

July 10, 2013
Keeping horses healthy and free of disease and disorders is a hot topic of conversation in many popular press journals, magazines and on the internet.  Horse husbandry advice ranges from nutrition to shoeing and veterinary care. Commonly offered suggestions on good horse health management generally start with the following list of recognized techniques: 

    • Employ qualified veterinary and farrier care and routine management such as de-worming and vaccinating

    • Feed good quality forag...
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Fighting Fly Allergies & Mosquito Borne Diseases Starts With A Proactive Understanding Of these Problems

May 24, 2013
It Takes More Than Insect Repellent To Manage Fly Allergies & Mosquito Control Issues. Learn How To Prepare Yourself For This Season's Pest Control Problems.
Amy M Gill, PhD

With trees and shrubs blooming and fly season approaching, you need to prepare your barn and horses for the upcoming warm weather and all the pollen, insects and mud that can wreak havoc on coats and hooves. Many horses develop allergies to environmental irritants and various flies. Here are a few things that can keep your ...
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