Study: Hay Helps Shetland Ponies Adapt to Winter Conditions

Ponies that didn’t receive extra hay adapted to the available food supply, but blood parameters suggested health problems could develop when the available fodder is insufficient.
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Study: Hay Helps Shetland Ponies Adapt to Winter Conditions
Ponies fed 100% of their nutritional requirements with supplemental feed adapted very well to the colder conditions through strong hair growth and reduced movement to use less energy. | Photo: iStock
Would you leave your Shetland ponies outside all winter? A new scientific study has confirmed what many people have believed for generations—that these hardy ponies do well in outdoor conditions even in the winter. But, they said, they likely benefit from supplemental hay.

Study ponies that didn’t receive supplemental feed during the winter adapted to the food supply available, but blood parameters suggested the beginning of health problems when the available fodder was insufficient, said Lea Brinkmann, PhD, of the University of Göttingen Department of Animal Sciences, in Germany.

In their study, Brinkmann and her fellow researchers followed 10 Shetland pony mares over a full year, from June to June, in Göttingen. During spring, summer, and part of autumn, the ponies lived at pasture. But from November to March, the researchers housed them in paddocks with a shelter. Half the ponies received food equivalent to 100% of their daily nutritional requirements. The other half gradually received less and less food—to mimic the kinds of nutritional changes that would happen in “natural” winter conditions—until they had only 60% of their daily nutritional requirements.

They found that all the ponies gained considerable weight at pasture in spring and summer, reaching higher-than-optimal body condition scores, Brinkmann said. However, the autumn pasture provided fewer nutrients, and the mares began to lose weight and body condition closer to a normal range during that period. Once they entered the paddocks and began the experimental feeding stage, the ponies fed 100% of requirements maintained constant body weight and condition. But those in the 60% group lost 12.8% of their body weight and dropped in body condition score from fat/very fat to moderate/good over the 16-week experimental period

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Passionate about horses and science from the time she was riding her first Shetland Pony in Texas, Christa Lesté-Lasserre writes about scientific research that contributes to a better understanding of all equids. After undergrad studies in science, journalism, and literature, she received a master’s degree in creative writing. Now based in France, she aims to present the most fascinating aspect of equine science: the story it creates. Follow Lesté-Lasserre on Twitter @christalestelas.

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