Changing Hay Sources for Horses

As a horse owner, I have moved quite a few horses around and recently moved my gelding to a new boarding facility, so thought this would be a good opportunity to share one aspect of my experience.

The Problem With Quick Hay Transitions

Hay Representing the importance of a gradual transition when switching hay sources for your horseTo help maintain as much consistency in his routine as possible, I made sure that I had 2 weeks’ worth of hay to take with me to help keep his diet consistent throughout the move and to allow for a gradual transition to the new hay.

When I told the barn managers at the new facility that I was bringing a few bales of hay over, they seemed a little surprised at this and told me not to worry about it, because they had really high quality hay.  I asked them if they would recommend a sudden change in a horse’s grain ration, and immediately they said of course not, due to colic risk. I replied, “Then why would you switch their hay cold turkey, when it makes up 60 – 70% of the horses diet?” and watched their expressions as they realized the point I was making.

The Importance of Gradually Transitioning Hay Sources

As a result, along with keeping his grain ration and meal times consistent with the previous routine, a gradual transition from the previous hay to the new hay was done over a 2 week period.  For the first couple of days he received his “old” hay only, and over time we incrementally replaced a small portion of his “old hay” with the “new hay” so that at 2 weeks post-move, he was completely switched over without any problems or decline in performance.

As horse owners, it is important to keep in mind that ANY sudden changes in diet, including fresh pasture and hay, can disrupt the environment in the gut where communities of microbes reside.  Consequently, this disruption in the microbial population and digestive process can put the horse at risk for GI upsets (e.g. excessive gas production, colic, diarrhea, discomfort, etc.). The energy and nutrient content in hay can vary drastically depending on the plant species, geography, soil conditions, plant maturity at harvest, climate conditions, baling and storage methods, etc.  Even hay that comes out of the same field from consecutive cuttings can have large differences in quality and nutrient content that should be considered.

It takes approximately 3 weeks for the microbes in a horses gut to adapt to dietary changes, thus making slow, gradual transitions over a 2 – 3 week period important to help prevent GI upset.  When it isn’t possible to make a full two week transition, then allow for as much of a gradual transition as possible even if is only over 2 – 3 days.  Providing dietary pre- and probiotics can also help support gut microbes through dietary changes especially if they are rapid.

At Nutrena, we believe proper nutrition plays the biggest role for a lifetime of health and happiness for every horse. That’s why Nutrena horse feeds are specifically formulated for every life stage and activity level. 
 
Ready to ensure your horse is getting the optimum nutrition at feeding time, every time? Find the perfect feed formulated specifically for horse’s needs with our Feed Selector Tool.
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Flash Fred – Our Inherited Horse

We inherited Flash Fred (my daughter has a creative naming process) from a friend of ours. This horse was slowing down in his old age and could no longer keep up with the rigorous lifestyle required on a full scale cattle ranch. In return for a good place to live out his last years we obtained this 20 year old (give or take a few years) sweet and gentle gelding for our girls. For us it was the perfect arrangement.

The horses that help our kids love horses are truly priceless.

Fred arrived in the middle of July and he was in surprisingly good body condition; I rated him about a 4.75. The problem was, we didn’t know anything about what he had been eating or what his previous history was, other than when we picked him up he was in a partial drylot but had just come in off of dryland pasture.

We decided to start Fred off slow. We had some irrigated grass pasture that we wanted to utilize but we didn’t want to turn him loose on it until we saw how he handled feed. For the first week he stayed in a drylot pen at our barn – he had plenty of room to wander around and get used to his new surroundings. We also gave him free choice plain white salt and plenty of clean, fresh water. For feed he got 2% of his bodyweight in medium quality grass hay and a ration balancer with a full vitamin and mineral package. He tolerated all this well (he also tolerated our 2 and 4 year old pretty well, which was great news!), so after the first week we worked on turning him out to pasture.

This was a slow process – many times new horses have a long history that new owners know nothing about: a tendency to colic, a predisposition to laminitis, allergies to certain leaves or weeds,  and the list goes on and on.

We didn’t want to take any chances with Fred, so his first taste of freedom in the irrigated green grass was a measly 20 minutes. He looked at me like I was crazy when I caught him right back up and put him in his pen! The next day he was out for a little bit longer, and gradually as the days went by we increased his time on grass by 20 minute increments until we had a good idea that he was doing well and not having any digestive upsets. To get him on a full day’s turn out took over two weeks – but keeping him healthy was definitely worth it. We continue to make sure that he always has access to clean, fresh water, plain salt and we give him a small flake (about 5 lbs.) of hay when we bring him in at night along with the maintenance ration of balancer. We score his body condition once a month, and so far the grass is agreeing with him! 

Today Fred is thriving – he is enjoying his relaxing grass pasture and our little girls are enjoying him! As the weather turns cold and the grass goes away, we will get him going on a senior type feed – so stayed tuned for that journey!

The Importance of Hay Quality for Your Horse’s Weight

hay, representing the concept of the different qualities of hay and their impact on a horse's weight managementThe quality of hay plays a crucial role in maintaining your horse’s weight and overall health. Today, we share a real-life scenario from one of our owners who’s horse faced weight loss challenges despite providing high-quality hay. By understanding the significance of hay quality and implementing proper measurement techniques, you can make informed decisions about your horse’s diet and ensure they receive the necessary calories for optimal weight management.

Assessing the Feeding Program:

A concerned horse owner sought assistance when their horse began losing weight despite being recommended alfalfa hay to address ulcer issues. With exceptional quality hay containing 1,000 calories per pound, the owner couldn’t determine the cause of weight loss in the horse’s feeding program.

Calculating the Diet:

Analyzing the horse’s work schedule and body condition score, we calculated a daily diet requirement of 21.5 Mcal. The diet consisted of four flakes of timothy hay and four pounds of grain per day. To meet the 2% body weight requirement for forage, we aimed for 20 pounds of hay, while the old hay tested at 800 calories per pound. The grain contributed 1.43 Mcal with a calorie content of 1,430 calories per pound.

Forage = 16 Mcal
Grain = 5.7 Mcal
Total = 21.7 Mcal

Identifying the Issue:

Despite feeding the same amount of hay, the owner believed there was a problem with the grain since the hay was of exceptional quality. However, we discovered that each flake of the old hay weighed around 5 pounds, which allowed us to reach the 20-pound feed rate with four flakes. When we weighed several flakes of the new hay, they averaged 3 pounds per flake.

Finding the Solution:

The problem became evident when we did the math. Each flake of timothy hay provided 5 pounds, resulting in a total of 16 Mcal (16,000 calories) per day. However, the new alfalfa hay, weighing 3 pounds per flake, only provided 12 Mcal (12,000 calories) per day. With this simple change, the horse’s caloric intake had been reduced by 4,000 calories daily over the past month. Increasing the number of hay flakes in the daily ration promptly resolved the issue.

The quality and measurement of hay significantly impact your horse’s weight management. This real-life example demonstrates the importance of accurately measuring hay portions and understanding its calorie content. By selecting the appropriate hay and ensuring your horse receives the necessary calories, you can effectively manage their weight and maintain their overall health.

At Nutrena, we believe proper nutrition plays the biggest role for a lifetime of health and happiness for every horse. That’s why Nutrena horse feeds are specifically formulated for every life stage and activity level. 
 
Ready to ensure your horse is getting the optimum nutrition at feeding time, every time? Find the perfect feed formulated specifically for horse’s needs with our Feed Selector Tool.
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The Price of Horse Hay

I received a phone call from a farm manager, asking who I purchased my hay from. I told him my hay supplier had excellent quality forage with good protein levels and averaged 1Mcal per pound. I gave him the phone number and he said he would call him for pricing.

While at the county fair this week I saw the farm manager and his students at the 4-H barn, so I asked if he had purchased any hay for his farm. He told me that the supplier I had told him to call was too expensive. He had quoted him $220 per ton, with a 5 ton minimum. Since he was not use to buying by the ton, he inquired as to how many bales that was, and was told it would amount to about 165 bales. The farm manager said he had done the math, and that the bales would be over $6.50 each, which was just outrageous!

I saw hay in his feed stall and asked if that was the hay he purchased. He said yes, and was proud to say it was only $5 per bale. He had purchased 200 bales for $1000. I lifted one of the bales and was surprised how light they were, so I asked if he knew what the hay has cost per ton. He had no idea. I then asked if we could wheel four of the bales over to the scale in the cattle barn to weigh them. “ You and your tons,” he replied…”Why not!”

Feeling certain he had gotten the best of a bargain, he loaded the bales and we took them to the scale. They varied from 36 to 40 pounds each, so we said an average of 40 pounds each. I then asked him to do the math.

200 bales x 40 pounds =8000 pounds or 4 tons.

$1000 /4 tons = $250 per ton.

He realized his “bargain” was not such a great value and laughed, “I know, I know…You don’t buy hamburger by the patty, and you don’t by hay by the bale.”

Hay Soaking: All Washed Up or Good Management?

This article is courtesy of Krishona Martinson, PhD, University of Minnesota.

Soaking hay in water is a common strategy used to manage the nutrition of some diseased horses.  Current hay soaking recommendations include soaking hay for 30 minutes in warm or 60 minutes in cold water for removal of carbohydrates (Watts, 2003).  Soaking hay is commonly done to manage horse diagnosed with laminitis, Polysaccaride Storage Myopathy (PSSM), hyperkalemic periodic paralysis (HYPP), and chronic obstructive pulmonary disease (COPD). 

  • Researchers have suggested that diets contain less than 12 and 10% nonstructural carbohydrates (NSC) for horses affected with laminitis (Frank, 2009) and PSSM (Borgia et al., 2009), respectively. 
  • Reynolds et al. (1997) determined that a diet less than 1% K is necessary for horses diagnosed with HYPP.
  • Moore-Colyer (1996) determined that soaking hay for 30 minutes reduced respiratory problems for horses diagnosed with COPD or heaves. 

However, how efficient is hay soaking, and are additional essential nutrients lost during the soaking process?  Researchers at the University of Minnesota set out to determine the impact of water temperature and soaking duration on removal of NSC, crude protein (CP), minerals, and dry matter (DM) from alfalfa and orchardgrass hays. 

Four hay types were soaked, including bud and flowering alfalfa, and vegetative and flowering orchardgrass.  Individual flakes were submerged for 15, 30 and 60 minutes in 25 liters of cold (72°F) and warm (102°F) water, and for 12 hours in cold water.  A control (non-soaked) sample was also evaluated.  Water temperatures were determined by using the cold or warm only faucets, similar to practices implemented by horse owners and managers.  Subsamples of entire flakes were submitted for nutrient analysis at a commercial laboratory.

  • Prior to soaking, both alfalfa hays were below the 10 and 12% NSC threshold for horses diagnosed with PSSM and laminitis, respectively, and would not have required soaking. The orchardgrass hays were above these thresholds, however, after soaking for 15 to 30 minutes were at or below 10 to 12% NSC. 
    • Although soaking hay for longer durations did further reduce NSC content, it is not recommended.  All horses, even diseased ones, require carbohydrates in their diet. 
    • The severely limited NSC content in hay soaked for greater than 1 hour, combined with increased fiber amounts (fiber components are not water soluble, thus they are concentrated in soaked hay), brings into question the palatability and availability of nutrients in hay soaked for longer periods of time.
  • Crude protein leaching was variable in soaked hays, something other researchers have also observed (Moore-Colyer, 1996).  More importantly, previous research looked at the nutrient availability and quality of rained-on hay fed to steers and suggested the nitrogen remaining in rained-on hay is more stable, water-insoluble (Rotz and Muck, 1994), and possibly less digestible by ruminants (Licitra et al, 1996).  Additional research is needed to evaluate this concept when feeding soaked hay to horses.        
  • Calcium (Ca) is not as prone to leaching during soaking compared to other minerals, and appears to be dependent on hay maturity.  As soaking duration increased, leaching of Ca increased in alfalfa bud and vegetative orchardgrass hays (immature hays).  However, soaking had no effect on Ca leaching in the more mature hays. 
    • Conversely, magnesium (Mg) Mg and phosphorus (P) levels were reduced in all hay types as a result of soaking, with longer soaking durations leading to greater reductions.  Because Ca is not as water soluble as P, high Ca:P ratios were observed in hays soaked for  longer durations, specifically after 12 hours. 
    • Ideally, Ca:P ratios should range from 1:1 to 3:1 (up to 6:1) in horse diets (NRC, 2007).  The high Ca:P ratios observed after longer soaking durations were exaggerated in alfalfa hays which had higher Ca:P ratios prior to soaking. 
    • After 12 hours of soaking, a deficiency in P was observed and ranged from a shortage of 1 to 8 grams for a 500 kg horse in light work (NRC, 2007), and Krook and Maylin [32] suggested that osteochondrosis may be associated with excess dietary Ca. 
  • Soaking both alfalfa and orchardgrass hay for 12 hours was necessary to sufficiently reduce K concentration to recommend levels prior to feeding horses diagnosed with HYPP (Reynolds et al, 1997).  Although K levels can be reduced by soaking, neither alfalfa nor orchardgrass hay is an appropriate option for horses diagnosed with HYPP due to the naturally high levels of K. 

Owners should rely on forage analysis as the primary method of determining the appropriate hay for horses, especially when feeding horses diagnosed with laminitis, PSSM, HYPP or COPD.   Hay soaking for short durations (15 to 30 minutes in duration) is an acceptable management method, but should only be used if ideal hay is not available.  Hay should not soak hay for greater than 1 hour.  Soaking hay for long durations resulted in severely reduced NSC content, high Ca:P ratios, shortage of P in the diet and significant losses in DM.

Forages for Horses

This blog post is courtesy of Jennifer Earing, PhD, University of Minnesota.

Forage selection should be based on horse needs, as there is no one forage best suited for all classes of horses.  For example, providing a nutrient-dense forage like vegetative alfalfa hay to ‘easy keepers’ can create obesity issues; however, that same hay would be good option for a performance horse with elevated nutrient requirements.  With so many forages available, how does one choose the best option??  Differences in the nutritive quality of forages (hay or pasture) are largely based on two factors: plant maturity and species.

Maturity

Regardless of plant species, stage of maturity significantly affects forage quality. 

  • Young, vegetative forages are very nutrient dense and contain fewer fibrous carbohydrates (hemicellulose, cellulose, and lignin). 
  • As the plant matures (flowers and seed heads are indicators of maturity), the proportion of fiber in the plant increases, to provide structural support as the plant gets larger.  The increased level of lignin associated with maturation interferes with the digestion of cellulose and hemicellulose by hindgut microorganisms, thereby reducing the digestibility of the forage.  
  • More mature forages also have lower energy and protein levels than their immature counterparts. 

Most horses do well on mid-maturity forages; horses with elevated nutrient requirements benefit from receiving young, less mature forages, while more mature forages are be best suited for ‘easy keepers’.

Plant species

Legumes vs. Grasses
Legumes (i.e. alfalfa and clovers) generally produce higher quality forage than grasses.  Often, legumes have higher energy, protein, and mineral (specifically calcium) content when compared to grasses at a similar stage of maturity, and are typically more digestible and more palatable. Legumes are an excellent source of nutrients for horses; however, a horse’s nutrient requirements can easily be exceeded when fed immature legumes.  Consumption of excess nutrients, particularly energy, may result in obesity or other digestive issues.  Legume-grass mixes or mid- to late-maturity legumes (which are less nutrient-dense) often provide adequate nutrients, without exceeding the horse’s requirements.    

Cool Season Grasses vs. Warm Season Grasses

Cool-season grasses (CSG; i.e. timothy, bromegrass, bluegrass, and orchardgrass) typically have a higher nutritive value compared to warm season grasses (WSG; i.e. bahiagrass, bermudagrass and bluestems).  At a similar stage of maturity, CSG have a higher protein content and lower fiber content.  The higher fiber content in WSGs is due to the fact that they mature and become lignified more rapidly than CSGs.  WSGs in late stages of maturity are typically less digestible and may be less palatable than CSGs.  Consequently, if feeding WSGs it may be advantageous to harvest the forage at an earlier stage of maturity, compared to CSGs.

CSGs store the majority of their carbohydrates as fructans, while WSGs and legumes store their carbohydrates as starch.  Rapid consumption of forages containing high levels of fructans, as with other water-soluble carbohydrates, may trigger laminitis in susceptible horses.  Fructan levels are highest in lush spring pastures and often increase during drought conditions.  Carbohydrate content of forage is an important consideration for owners of horses struggling with chronic laminitis issues, equine metabolic syndrome, and PSSM

Differences in average nutritive values of forages commonly fed to horses are shown in Table 1.

Conclusion

The digestive system of the horse has been designed to efficiently utilize forages, and most horses can fulfill their nutrient requirements on these types of diets.  Matching the nutrient levels in the forage to the nutrient requirements of the horse is one of the primary goals in forage selection.  A variety of factors, including plant species and maturity, should be considered when making this decision.

When Should I Feed a Complete Horse Feed?

A complete feed is a fortified grain/forage mix that is formulated with high quality fiber sources to raise the total percent fiber in the feed, so that reduced hay feeding can be done safely. Some fiber sources in complete feeds include alfalfa, beet pulp, and soy hulls. These are all good digestible fiber ingredients for horses.

Reasons to Consider Feeding a Complete Feed

Addressing Challenges in Hay Availability and Quality

  • You have a horse with poor teeth or no teeth that can no longer chew and swallow hay. This can be a young or old horse.
  • Good quality hay is hard to find, obtain, or pay for. This situation will most likely occur in:
    • Drought situations when plants aren’t growing or they are very mature when they get tall enough to cut. When a plant gets too mature it has high levels of lignin that can’t be digested by the horse leading to digestive upsets or increased risk of colic. Plants also lose nutrient content the more mature they get.
    • Extremely wet conditions because it may be more mature by the time a farmer gets good weather to cut it and flooding can also bring debris onto fields that can be harmful to your horse.
    • Situatinos where hay gets more expensive as fertilizer and fuel costs rise.

Cost-Effectiveness of Complete Feeds in Certain Situations

  • There is a lot of hay wasted from handling, transporting, ect. More hay is wasted when horses are fed round bales. When hay is expensive and there is a lot of waste, complete feeds may be more cost effective.
  • Hay is hard to handle and round bales/large square bales require a tractor for handling and other equipment such as a flatbed trailer. Equipment requires fuel, tires, maintenance, ect. The cost of handling hay should be brought into consideration when cost is a major factor in feeding.

Importance of Long Stem Forage in a Horse’s Diet

Long stem forage is an important part of the horses diet and a good source of forage should comprise of at least 50% of the horses daily intake when possible. However, when any of the above conditions exist it may be necessary to feed a complete feed only or reduce the amount of hay being fed. A horse that can no longer chew hay will need to get all of his daily requirements from a complete feed that is easy to eat such as a senior complete feed with softer pellets that can also be fed as a wet mash. If hay shortage, hay cost, or drought is the reason you feed a complete feed you may want to continue feeding some hay in the diet for long stem forage if possible.

Reading and Following Feeding Recommendations for Complete Feeds

It is important to read and follow the feeding recommendations when buying a complete feed, and they should list the recommended feeding amount both with and without hay on the tag. As you decrease the amount of hay, you will need to increase the amount of complete feed. Here are two examples of complete feeds and how much to feed a 1,000 lb maintenance type horse with no hay and with hay/pasture.

Feeding Guidelines for Senior Horse Feeds

  • A senior horse feed – generally a highly digestible and highly palatable product that can be fed as a complete feed, and is designed for older horses.
    • A 1,000 lb maintenance type horse would receive 12 – 14 lbs of a senior feed, if no additional hay is fed.
    • The same horse, if it was being fed hay, would receive 5 – 7.5 lbs of the senior feed.

Utilizing Traditional Complete Horse Feeds

  • A traditional complete horse feed – known as “hay replacers” or “hay stretchers” – are a complete feed that combines high quality roughage and grains in a pelleted form. It can be fed as a complete feed or with forage.
    • If no hay is fed, a maintenance type horse would receive 1.5 lbs per 100 lb body weight. A 1,000 lb horse is recommended to get 1,000/100 = 10 x 1.5 lbs = 15 lbs of a complete feed.
      When feeding along with hay or pasture, a typical recommended amount to feed a maintenance type horse 0.5 lb per 100 lb body weight or 5 lbs.

Proper Feeding Practices for Complete Feeds

Whether you chose to feed a complete feed with hay or without, it is important to feed the recommended amount and make adjustments as needed depending on if your horse is an easy or hard keeper. It is also important to provide free choice salt and clean, fresh water at all times. Complete feeds should be split into two or more feedings. Horses should be switched slowly from one feed to another and also when eliminating hay from the diet. When reducing the amount of hay fed, it is recommended to reduce hay over 1-2 weeks.

Ready to ensure your horse is getting the optimum nutrition at feeding time, every time? Find the perfect feed formulated specifically for horse’s needs with our Feed Selector Tool.

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Using Hay Replacers for Horses

Severe drought through parts of TX and OK leaves hayfields and pastures brown and dry, and animal owners searching for replacement options.

When times of severe draught or other weather phenomenon result in poor quality or availability of pastures and hay, horse owners often turn to complete feeds (i.e. feeds that contain a full diet of roughage, protein, vitamins, minerals, and other needed nutrients) or hay stretchers/replacers (designed to replace the fiber component of the hay/pasture that is no longer available).   These products can be extremely useful to horse owners to help them through the tough hay times, but they do come with some usage guidelines to keep horses happy and healthy.

  • Follow the recommended feeding rate.
    • This is of particular concern if the product is being used as the sole diet.  To keep gut health intact, enough fiber must be consumed each day for regular gut function.  And, to keep the horse healthy overall, it is critical to ensure they are receiving all the balanced nutrients that they would normally get through a combination of hay, pasture, and added concentrate feed.
  • Horses tend to crave long stem fiber to chew on, which is missing in the diet made up of complete feed or hay stretchers. 
    • Owners will most likely see unwanted behaviors begin, such as wood chewing, cribbing, or weaving, without some grass or hay to keep their horse’s mouth and mind busy.  While the full daily allotment of hay may not be available or affordable, it is a good idea to offer at least a flake or two each day to help prevent these behaviors (and save your fences).  Hay cubes are an option if pasture or traditional baled hay is unavailable.
  • Ensure proper water and salt consumption.  Proper hydration levels are essential to keeping the gut moving properly.

In the absence of available forage, providing a complete feed concentrate is a better option than feeding a concentrate that is designed to be fed with forage, by itself.  With proper management and attention to detail, both the horse and the owner’s pocketbook can pull through the hay shortage!

How to Transition a Horse’s Feed

You may be thinking your horse might be in need of a senior diet, or perhaps there is a new feed available that you believe is even better for your horse.  Maybe you are no longer happy with your current feed.  Or, your dealer no longer carries the product you were using.  Whatever the reason, switching your horse to a new feed is a change that requires care and know-how. 

Changes to feed, pasture or hay in general should be made over a 7 day period, gradually increasing the new and decreasing the old.  For example:

Day 1: 80% of old feed / 20% of new feed

Day 2: 70% of old feed / 30% of new feed

Day 3: 60% of old feed / 40% of new feed

Day 4: 50% of each

Day 5: 40% of old feed / 60% of new feed

Day 6: 30% of old feed / 70% of new feed

Day 7: 20% of old feed / 80% of new feed

Moving from a feed higher in Non-Structural Carbohydrates (NSC) to one that is lower can be done relatively easily by following the instructions above.  If you are moving your horse from a ‘low’ NSC feed to one that is higher in NSC, feed changes should happen over at least the 7 days recommended above, if not longer. 

Research has indicated that horses fed pre and probiotics are better able to handle changes in diet than horses that are not. 

Changes in hay, though generally not given much consideration, can have as much of an impact if not more than changes in feed. If possible, try to follow the same steps as above when transitioning your hay.  Hay that is harvested from the same field, but in different cuttings will likely vary in nutritional content. Hay testing is available from many University Extension offices.  Check with your area extension office for more information.

Vitamin A for horses

Hay bales in a field representing the importance of Vitamin A for horses
Vitamin A is a crucial fat-soluble vitamin for horses, playing a vital role in their overall health and well-being. While horses that have access to green forage can obtain sufficient Vitamin A through carotene conversion, those fed poor quality roughage or lacking access to green forage may require supplemental Vitamin A. However, it’s important to be cautious of potential toxicity when supplementing Vitamin A in addition to a well-fortified grain base. This article will explore the role of green forage, causes of Vitamin A deficiency, and total dietary requirements for horses of different activity levels and life stages.

Role of Green Forage in Meeting Vitamin A Requirements

Green, leafy roughages provide carotene, which horses can convert into Vitamin A. However, bleached, weathered, or dark and dusty roughages do not contain sufficient vitamin content. When horses have access to good quality green forage, they can generally meet their Vitamin A needs. But if a horse is fed poor quality roughage, supplementation becomes necessary.

Causes and Symptoms of Vitamin A Deficiency in Horses

Many horses experience Vitamin A deficiency due to consuming hay stored for extended periods. Commercially prepared grains often include Vitamin A to address this deficiency. However, it’s essential to avoid overdosing horses with high-potency vitamin supplements when they are already receiving well-fortified grains.

The signs of Vitamin A deficiency in horses include dry, scurfy skin and hair coat, runny eyes, and night blindness. Studies have shown that night blindness can be induced by Vitamin A deprivation and reversed by adding sufficient Vitamin A back into the diet. Other symptoms may include dry and scaly hooves, increased susceptibility to respiratory infections, stress, and diarrhea. Toxicity symptoms may include dry hair, anemia, and increased bone size.

Total Dietary Requirements for Horses

According to the 2007 NRC Guidelines, the total dietary Vitamin A requirements for an 1100lb horse are as follows:

– Maintenance horses: 15,000 IU per day
– Moderately active horses: 22,500 IU per day
– Pregnant/lactating mares: 30,000 IU per day

Additional Vitamin A is crucial during the last 90 days of pregnancy, lactation, and for high-performance horses and weanlings.

Vitamin A plays a vital role in the health and well-being of horses. While green forage can meet their Vitamin A requirements through carotene conversion, horses fed poor quality roughage or lacking access to green forage may require supplemental Vitamin A. It’s important to be cautious of potential toxicity when supplementing Vitamin A on top of a well-fortified grain base. By understanding the causes and symptoms of Vitamin A deficiency, horse owners can ensure their horses receive adequate nutrition for optimal health and performance.

At Nutrena, we believe proper nutrition plays the biggest role for a lifetime of health and happiness for every horse. That’s why Nutrena horse feeds are specifically formulated for every life stage and activity level. 
 
Learn more about our feeds formulated specifically for hard keepers to ensure your horse is getting the optimum nutrition  to maintain their weight and health at feeding time, every time.
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