Star Milling

Equine Nutrition - Nutritional Management

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“Big belly” syndrome is not because of her age but most likely due to the difference in hay quality. The hay you purchased a few months ago is not necessary going to be the same quality purchased at a later date. This condition can occur particularly when a hay is low in protein and very high in fiber. Adequate protein is not only essential to the horse’s body but is also essential to the bacteria that reside in the gut. The gut’s microorganisms are dependent on protein, and the micros are the only component of the digestive process that can break down the fiber portion of the diet.

Hay belly usually parallels an all long-stem forage diet and is often associated with pastured horses since they consume more volume compared to hay because pasture approximates 80% water and hay has roughly 10% water.

If you are feeding West Coast timothy then 3 flakes would approximate 17 - 18 pounds of hay. With the 5 scoops of timothy pellet – and I do not know the size of your scoop – conservatively that would be 5 - 6 lbs. A small coffee can of pellet hay is more than 1 lb so if your scoop is larger than a small coffee can the weight would be more. So 22 - 24 lbs of forage for a 1000 lb horse is 2.2 - 2.4% of their body weight which is the maximum forage for a light working horse. Another option is that you can use Timothy pellets to replace a portion of the timothy hay. Processed hays (pellets and cubes) should not be more than 50% of the total hay fed per day.

I suggest eliminating the hay pellet and replacing it with Integrity Lite. Integrity Lite is very low in starch and sugars and is available with or without molasses. Based on the information you provided, a 1,000+ lb horse in good health, dewormed 6 times/yr, with a light workload should be fed approximately 16 - 18 lbs of hay per day and 1.5 - 3 lbs of Integrity Lite.

The numbers do not add-up.

Seven flakes of West Coast timothy is approximate 42 – 45½ lbs; one flake of alfalfa is about 6½ lbs; three coffee cans of alfalfa and Bermuda hay pellets approximates 3½ lbs; one coffee can of rice bran approximates ½ lbs; 1 coffee can of beet pulp (dry) approximates ½ to ¾ lbs. That all adds up to 53 – 56½ lbs of feed per day!

I do not know your horse’s body weight. If we assume he is of moderate bone for a Hanoverian around 16 hands, then his body weight would be about 1,250 lbs. That would mean he is being fed 4.25 to 4.5% of his body weight each day—an impossible amount of dry feed for a horse to consume daily. A horse of this body weight and work would consume approximately 2.25% of body weight and certainly not more than 2.5%.

I would suggest you weigh your feeds to be sure we are on the same page relative to weight of a flake and coffee can. Also, how much hay is left after each feeding? Do you purchase the feed and feed the horse?

There is another possibility which I have experienced once before. Who does the feeding? Are there other horses at the stable? Another time a similar question came up—also with a warm-blood—purchased the feed but did not feed the horse. After talking to me and doing some investigative work, she learned she was feeding more than her horse at the stable each day. Hope that is not your case.

Several things will influence your horse’s water intake during the winter months. Perhaps the most important consideration is the temperature of the water. In general, optimum temperature for drinking water should be 45 - 65° F. If you have extended periods of cold temperatures and are using water troughs that do not need a daily refill, then there is a good chance that your water temperature will drop below 45°.

Horses drink less water when the water temperature is outside the optimum 45 - 65° F range. Just like with humans, drinking a significant amount of water that is just above freezing, isn’t easy to do. During cold winters, horses will drink enough water to maintain body functions but may not be hydrated at normal levels. This subclinical dehydration is a cause for winter colic.

Other considerations for why your horses are drinking less water:

  • They are less active during winter months o They perhaps have less turn out time
    • Less pasture grazing
    • They have less routine work
  • A change in forage (such as replacing long stem hay with pellet hay)

It depends on the feedstuff that makes up the pellet, but in general, if the pellet is a hay pellet, the opposite actually occurs. Fiber feeds that have been ground for a pellet form will actually reduce a horse’s water intake when compared to the same forage from a bale (hence, long stem fiber requires the horse to drink more water).

If the pellet is high in protein, then the amount fed to the horse could also influence its water intake. If an animal consumes more protein than its protein requirement, then the excess protein translates to excess nitrogen (protein is approximately 16% nitrogen). Excess nitrogen is eliminated as a waste product through the urine, which is why the horse drinks more water—to get rid of the nitrogen. In addition to fiber and protein, electrolytes and starch concentration are other feed components that will influence water intake.

Micturition is another word for urination.

It depends on the feedstuff that makes up the pellet, although generally the opposite occurs. Fiber feeds in pellet form actually reduce water intake, when compared to bale form. That is why long stem fiber requires the horse to drink more water. Protein, electrolytes, and starch concentration are other feed components that will influence water intake, regardless of the feed form.

Nitrogen is a major element in amino acids/protein. It is eliminated through the urine. So a feed that contains high protein contains high nitrogen levels. Thus, when more protein is fed to a horse above requirements, it translates to the horse drinking more water to eliminate the excess nitrogen.

Extrusion is a process in which feed is ground, quickly cooked at a high temperature, and processed under high pressure. The feed is then pushed through a die, which makes the feed a unique and uniform shape. The main benefit of extruded feed is improved digestibility.

The difference between pelleted and extruded feed is that pellets are not cooked, and are prepared at a much lower temperature and pressure.

For raw feed ingredients—specifically grains such as corn, oats and barley—both pelleting and extrusion can improve the digestibility. The amount of grains in a formula is also a factor in determining if extrusion is beneficial to the overall digestibility.

While extrusion can be very beneficial, the nutritional value of a feed is more dependent on the formula than the type of processing.

The production of gas in the gut (gastrointestinal tract) is normal for all mammals and especially for those animals whose gut is designed to eat large quantities of plant materials. Horses are classified as non-ruminant herbivores. Their hindgut, which includes the cecum and colon, is the major site for fermentation of the plant materials that are not (or can not) be digested in the foregut through chemical and enzymatic digestion. In the fermentation process, it’s the “job” of the microorganisms to digest the plant materials and produce selective nutrients and energy that are available to the horse. “Gas” is a by-product of the fermentation process and the horse’s gut is capable of moving the gas though the colon to be released.

Excess gas production, which has the potential of causing a first class bellyache, known as colic, can result from numerous factors. These factors include inadequate fiber in the diet, inadequate exercise, inadequate consumption of water (note: fiber and exercise influence water consumption), inadequate management routine, certain drugs, especially antibiotics, over feeding starchy feeds, changes in feeds and amount fed, inconsistent daily meal frequency and amounts fed, and (perhaps the cause that will step on the toes of horse owners) inadequate nutritional management experience and knowledge.

Beet pulp and soy hulls contain a type of fiber that is fermentable and is broken down by the microorganisms that live in the gut. The grasses that are fed via pasture and hay also have some fermentable fiber as well as the fiber that is classified as insoluble fiber. If there is inadequate forage provided, and the horse is fed a large quantity of fermentable fiber, then excess gas production could occur. Another scenario is if large portions of grain type feeds (in which major ingredients including corn, oats, and/or barley) are fed, then an excess gas production could occur. Any combination of factors listed in the first paragraph can cause excess gas production. The bottom line is that nutritional management of the horse plays the most important role in his gut health. Nutritional Management does not come from what we read on the internet, it’s a result of time, experience and education.

In addition, there some horses whose gut may be more sensitive to fermentable fiber type feeds. Through my 40+ years of experiences with horses as an owner, breeder, farm manager, university professor, and nutritional consultant, I have not had one horse that could not be easily managed with a diet that includes fermentable fiber such as beet pulp and soy hulls.

Summary: Beet pulp and soy hulls:

  • Are important feedstuffs in the nutritional management of horses.
  • Are safe sources of energy in balanced concentrates to fuel the horse in whatever he does.
  • Are solid ingredients with other feedstuffs that are formulated for a balanced concentrate mix that will complement the forage portion of the horse’s diet.
  • Have bulk laxative like properties that will assist the gut to contract with consistency and regularity as well as maintain a healthy microorganism population in the gut.

The bottom line: the information provided by your veterinarian is incorrect.

I am unclear of the origin of soaking beet pulp for a day or 24 hours but that practice is not only excessive but also unfounded—you are not making beet pulp wine! The practice of adding water to beet pulp is to soften the feed because the beet pulp by-product is stiff and course. Chewing reduces the feed’s particle size as well as stimulates salvia production which moistens the feed. The chewing and moistening process thus prepares the feed for swallowing. The amount of beet pulp consumed by the horse at each feeding really determines the chewing effort that is needed to prepare the food for swallowing. Some horses tire of the chewing process more quickly than others which are often driven by the compulsion to eat more. Other horses may be disciplined eaters and just take their time with the chewing process. The general rule I provide for beet pulp shreds is at least 1½ times the volume of water compared to the beet pulp volume; allow the mixture to soak until it softens, which will usually be ready after a couple of chores prior to feeding time.

if taste is the issue then the most common flavor camouflage is something sweet. A cup of Integrity Lite with molasses is an option. The very small amount of molasses will help disguise the bitter taste that is common with many OTC supplements or even medications. Integrity Lite No Molasses is a low starch, low sugar, no grains, and highly soluble fiber-balanced formula. The starch content of Integrity Lite No Molasses averages less than 4.3% starch and 5.9% sugar (ESC).

Molasses or brown sugar is another option. A tablespoon or two of either will add insignificant amounts of sugar relative to the amounts of sugar already in a typical forage diet. I understand there are those that may objective to this option but many do not understand the amounts of sugars and starch that already exist in a typical forage diet. Viewing the example at the bottom of the Nonstructural Carbohydrates Fact Sheet may help put it into perspective.

If your horse has laminitis and any rotation of the coffin bone you will need to exercise caution with the feeding and exercise program. Talk with your veterinarian. The OTC supplement you referenced is a source of Mg (magnesium) and Cr (chromium) and there is no evidence that these two minerals will strength a hoof made of keratin.

Much of this concern has evolved from misleading information about soy. There is zero evidence showing that horses are allergic to soybean meal, soybean oil, or whole roasted grounds soybeans.

Blood tests commonly used for diagnosing allergies are not a reliable diagnostic tool according to experts in the field. Board certified experts in the field lack confidence in blood tests and recommend skin tests instead. Granted, skin test are expensive and require an expertise other than general practice.

You may have heard about trypsin inhibitor as it relates to the trypsin enzyme. Proteins are too large to be absorbed into the blood stream and several enzymes are responsible with breaking down the proteins into smaller ones (peptides) and to the amino acids. Trypsin is one of those enzymes that is produced in the pancreas, released into the gut and has a specific job in the digestive/preparation process of protein.

There is a trypsin inhibitor in raw soybeans which is why a standard and common practice is to roast the soybeans prior to use and formulating in animal and human foods. The roasting is at a fixed temperature and time period to denature (destroy) the trypsin inhibitor. around 1000 lbs, then feeding 1 ½ lbs of Integrity Lite will work, or feeding half the amount recommended of a generic vitamin/mineral horse supplement.