Feeding of domesticated equines such as horses, ponies, mules, and donkeys.
Equine nutrition is the feeding of horses, ponies, mules, donkeys, and other equines. Correct and balanced nutrition is a critical component of proper horse care.
Horses are non-ruminant herbivores of a type known as a "hindgut fermenter." Horses have only one stomach, as do humans. However, unlike humans, they also need to digest plant fiber (largely cellulose) that comes from grass or hay. Ruminants like cattle are foregut fermenters, and digest fiber in plant matter by use of a multi-chambered stomach, whereas horses use microbial fermentation in a part of the digestive system known as the cecum (or caecum) to break down the cellulose.[1]
In practical terms, horses prefer to eat small amounts of food steadily throughout the day, as they do in nature when grazing on pasture lands.[2] Although this is not always possible with modern stabling practices and human schedules that favor feeding horses twice a day, it is important to remember the underlying biology of the animal when determining what to feed, how often, and in what quantities.
The digestive system of the horse is somewhat delicate. Horses are unable to regurgitate food, except from the esophagus. Thus, if they overeat or eat something poisonous, vomiting is not an option.[3] They also have a long, complex large intestine and a balance of beneficial microbes in their cecum that can be upset by rapid changes in feed. Because of these factors, they are very susceptible to colic, which is a leading cause of death in horses.[4] Therefore, horses require clean, high-quality feed, provided at regular intervals, plus water or they may become ill if subjected to abrupt changes in their diets.[5] Horses are also sensitive to molds and toxins. For this reason, they must never be fed contaminated fermentable materials such as lawn clippings.[6] Fermented silage or "haylage" is fed to horses in some places; however, contamination or failure of the fermentation process that allows any mold or spoilage may be toxic.[7][8]
^Williams, Carey A., Ph.D., Extension Specialist. "The Basics of Equine Nutrition" from FS #038, Equine Science Center, Rutgers University, Revised: April 2004. Archived 2007-04-08 at the Wayback Machine Web site accessed February 9, 2007
^"Horse Nutrition - Frequency." Bulletin 762-00, Ohio State University. Web site accessed February 9, 2007.
^Giffen, James M. and Tom Gore. Horse Owner's Veterinary Handbook., 2nd ed. New York:Howell Book House, 1989, 1998. ISBN 0-87605-606-0
^"Colic in Horses" ASC-128, Cooperative Extension Service, University of Kentucky, College of Agriculture, Equine Section, Department of Animal Sciences. web site accessed March 14, 2007
^March, Linda. "Feeding Your Horse To Avoid Problems," from University of Illinois, College of Veterinary Medicine. Archived 2007-02-02 at the Wayback Machine Web site accessed February 16, 2007
^A. Cirelli, Jr. and B. Cloud. "Suburban Horse Keeping." (PDF) Fact Sheet: 94-09, Cooperative Extension Service, University of Nevada, Reno. Web site accessed July 4, 2009.
^"Horse Nutrition - Carbohydrates and fats." Bulletin 762-00, Ohio State University. Web site accessed February 9, 2007.
^Karen Spivey and Jackie Nix. "Haylage" North Carolina Cooperative Extension Service. Web site accessed July 4, 2009.
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