Extension Horses Members

Who are your Horse Experts?

Kris Hiney, Chair, Extension Horses Inc., Extension Horse Specialist, Oklahoma State University

Karen Waite, Past-Chair, Extension Horses Inc., Michigan State University

Colleen Brady, Extension Horses Inc., Youth Horse Extension Specialist, Purdue University

Kathy Anderson, Chief Financial Officer, Extension Horses Inc., Extension Horse Specialist, University of Nebraska

Ashley Griffin, Executive Co-chair Extension Horses,  Program Manager Impact Collaborative, eXtension Initiative

Elaine Long Bailey, Extension Educator, 4-H Youth Development, University of Maryland…

Equine Thermoregulation

How Do Horses Stay Cool During Work and Exercise?

Authors: Craig Wood, Ashley Griffin, University of Kentucky

Thermoregulatory mechanisms in the horse are very important during exercise and work. Heat production occurs with the metabolism of fuels for exercise. Thoroughbred racehorses produce enough heat to increase their body temperature 3.25º C to 5.42º C. As in human athletes, the equine athlete’s thermoregulatory system utilizes convection, radiation, respiratory losses, and evaporation to remove heat from the body. …

Bacterial Diseases of the Horse


Craig Wood, University of Kentucky

Strangles is a highly contagious upper respiratory infection in horses. The cause has been identified as a bacteria. The disease has a low mortality rate, yet the economic ramifications due to long recovery periods can be great. The disease is contracted through environmental contamination, nasal discharge, or direct contact with infected animals.

Clinical Signs
1. high fever of 103 to 106 F
2. loss of appetite
3. a moist cough
4. clear nasal discharge that

Equine Protozoal Myeloencephalitis (EPM)

Craig Wood, University of Kentucky

The organism Sarcocystis neurona, a single-celled animal, can cause equine protozoal myeloencephalitis (EPM), a neurological disease that can affect equines of any age, sex, and in any location throughout the United States. The parasitic cycle involves birds eating plants and other animals of prey that carry the sporocysts of the organism. The opossum then eats birds killed by the effects of the disease. The organism reproduces sexually in the opossum and is passed …

Equine Muscle Fiber Types

In equine athletes, muscle fibers are classified as either slow twitch or fast twitch fibers.

Types of Muscle Fibers

Slow twitch, or Type I, fibers are highly oxidative, meaning they use aerobic metabolism to produce energy-generating ATP. These fibers are used for endurance and are said to be “fatigue-resistant” because they are capable of reducing the toxic end products of metabolism, such as lactate.

Fast twitch, or Type II, fibers are subdivided into Type II A and Type II B …