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Teff: A Beneficial Forage For Easy-Keepers And Metabolically Challenged Horses

Teff may seem like an overnight success for some in the horse industry. However, teff has been a cultivated forage in the U.S. for some time. So why has teff become so popular and where does it best fit in the horse's diet?

Teff is an annual, warm-season grass that many believe originated from Ethiopia, where it was cultivated as a grain crop for human consumption. Teff is fine-stemmed, fast-growing, high-yielding, seems adaptive to numerous environments, and tends to thrive in warmer, drier conditions. However, teff's nutrient profile is what makes it attractive to many in the horse industry.

Compared to cool-season grasses and legumes, teff tends to be higher in fiber values and lower in nonstructural carbohydrates (NSC) and digestible energy (DE). This nutrient profile makes it an appealing option for horse owners with “easy-keeping” horses, over-weight horses, or horses diagnosed with Equine Metabolic Syndrome (EMS), laminitis, Pituitary Pars Intermedia Dysfunction (PPID), or Polysaccharide Storage Myopathy (PSSM).

These horses tend to require total diets lower in NSC and DE, making teff a desirable option. Elevating teff's popularity and demand is the rate of obesity and related issues (e.g. EMS and laminitis) in the horse population. Similar to human and companion animal populations, obesity in the horse population is estimated at 30 percent, requiring many horse owners to seek lower caloric feedstuffs. However, what does research say about fitting teff into horse diets?

Researchers at the University of Minnesota have explored the impact of horses grazing teff. They found that teff produced less season-long yield compared to alfalfa and perennial ryegrass, primarily due to less grazing events. Since teff is a warm-season grass, it must be planted later in the spring in northern climates when soil temperatures are warmer and is more easily killed by cooler fall nights compared to cool-season grasses.

Teff was confirmed to have higher amounts of fiber and lower amounts of NSC, DE, and crude protein (CP) compared to cool-season grasses and legumes. The combination of higher fiber values, which tend to slow intake, and lower NSC values have been reported to decrease the glucose and insulin response in horses. Similar to humans, maintaining a more level (or homeostatic) insulin response is thought to be desirable to overall health, especially in horses diagnosed with metabolic diseases like EMS.

Researchers found that blood glucose and insulin values of horses grazing teff, cool-season grasses, and legumes were not different in the spring and summer; however, they were lower when horses grazed teff in the fall and late fall (September and October) compared to horses grazing cool-season grasses.

Fall grazing tends to be a risky time for horse diagnosed with metabolic diseases, or with a history of laminitis, as warm days and cool nights can lead to spikes in NSC concentrations in cool-season grasses. Although teff was lower in DE, if consumed at 2.5 percent bodyweight on a dry matter basis daily, it did meet the DE requirements of adult horses at maintenance.

Additionally, when a more detailed amino acid analysis was conducted, researchers found that while alfalfa and cool-season grasses had greater concentrations of most amino acids, horses grazing teff had similar blood amino acid responses compared to the other forages. This suggested that the lower CP values found in teff were not detrimental to the mature, idle grazing horses. Finally, teff did tend to have a slightly inverted Ca:P ratio, making it essential to test teff for forage nutritive values and supplement Ca when necessary.

Several universities have also explored harvesting teff as hay and adult horse preference. When harvested under ideal weather conditions and maturity, most describe teff hay as fine-stemmed and leafy. However, like any forage, environmental conditions, maturity at the time of harvest, and production practices can greatly impact forage quality.

In a hay preference trial conducted at Penn State, horses unaccustomed to teff preferred both mature alfalfa and timothy hay over teff hay. However, many agree that once acclimated to teff, most horses will readily consume teff. A Kentucky study investigated the intake of teff hay cut at three different stages of maturity (boot, early, and late).

Based on voluntary intake, horses preferred boot (1.8 percent bodyweight) and early-maturity (1.7 percent bodyweight) teff hays over late maturity hay (1.5 percent bodyweight). Similar to what is observed in grazing research and with other forages, maturity can be a major factor in palatability and intake.

In the Kentucky study, nutrient requirements for mature horses eating the less mature teff hays were generally met, although when consuming the late-maturity teff, DE and CP requirements were not met for adult horses at maintenance.

Collectively, research on grazing teff and feeding it as hay confirmed it can be used as a horse forage, but is more suitable for horses with lower energy demands or horses prone to metabolic concerns. While teff's niche in the horse industry is most likely as a forage for “easy-keeping,” overweight, laminitic or metabolically challenged horses, there are some drawbacks and frustrations horse owners have anecdotally shared.

Because of the higher fiber values and lower NSC, some horses simply refuse to eat the forage. This is not surprising as past research has shown preference and intake are positively linked to NSC amounts and negatively linked to fiber values. In these cases, owners should provide part of the diet in teff, while including other more palatable forages.

Like any newer forage, there is also a learning curve in planting, harvesting, and feeding the forage. A few challenges shared by hay producers include successfully planting the small-seeded forage, timely harvests, ideal cutting frequency of the mostly prostrate growing forage, and lack of labeled herbicide options. Finally, research is needed to establish if horses can be successfully maintained long-term on only teff forage, and a vitamin and mineral supplement.

The post Teff: A Beneficial Forage For Easy-Keepers And Metabolically Challenged Horses appeared first on Horse Racing News | Paulick Report.

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Study: Hungry Ponies May Want To Hibernate

If you've ever jokingly referenced having “the urge to hibernate” when the weather turns cold, you're not alone! Interestingly, ponies may feel the same way—especially if they don't have enough to eat.

Animals that hibernate experience a decrease in both their heart rate and their body temperature when winter weather hits; their metabolism also slows. Drs. Lea Brinkmann, Martina Gerken, Catherine Hambly, John Speakman and Alexander Riek created a study to se if ponies had similar physiological adaptations.

The research team used 10 Shetland ponies and studied them through the year, measuring each pony's vital signs and using blood tests to check metabolic rates. During winter months, they fed all 10 ponies a diet that met 100 percent of their maintenance needs. They then divided the ponies into two groups: one group received meals that met tall their metabolic needs and the second group was put on a diet that provided only 60 percent of the pony's energy requirements.

The team discovered that the ponies on the restricted winter diet had lower metabolic rates and their body temperature dropped. The scientists say that these changes, which are similar to changes hibernating animals experience, compensated for a decreased energy supply during the time of year when energy is needed to maintain warmth.

The pony's behavior didn't change, but the reduction in metabolic rate and temperature enabled them to minimize the effect of limited energy stores.

Study: Chubby Horses Don’t Eat More Than Leaner Counterparts

Though it's long been assumed that fat horses would eat more than their leaner peers if given an option, a study from North Carolina State University shows that this isn't actually the case. When allowed to make their own choices, chubbier horses not only eat similar quantities of food, they also exercise the same amount as their thinner herd mates.

Drs. Jennifer Moore, Paul Siciliano and Shannon Pratt-Phillips used 10 horses that they separated into two groups: one group included six horses that had body condition scores of more than 7; the other group included leaner horses with body condition scores of 4 or 5. Over the course of 25 days, both groups transitioned from a diet that relied heavily on grazing to one that was based on free-choice hay. Once the horses were transitioned over, the scientists monitored their hay intake and metabolic state for the next 11 days.

Horses had blood drawn regularly throughout the study. Fecal samples were also collected from each horse to determine dry-matter digestibility and gross energy digestibility. The horses also wore heart rate monitors that had GPS trackers that collected data to calculate each horse's energy expenditure.

The study team found no significance difference in the energy intake and expenditures between the two groups of horses. Interestingly, the obese horses were more active for longer periods of time than the lean horses. They also spent less time eating. The scientists concluded that obesity in horses does not appear to be related to excess food intake or reduced activity; obesity is most likely related to metabolic issues.