• Open Access

Prevalence of Overconditioning in Mature Horses in Southwest Virginia during the Summer

Authors

  • C.D. Thatcher,

    Corresponding author
    • Department of Large Animal Clinical Sciences, Virginia-Maryland Regional College of Veterinary Medicine (VMRCVM), Virginia Tech, Blacksburg, VA
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  • R.S. Pleasant,

    1. Department of Large Animal Clinical Sciences, Virginia-Maryland Regional College of Veterinary Medicine (VMRCVM), Virginia Tech, Blacksburg, VA
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  • R.J. Geor,

    1. Middleburg Agricultural Research and Extension Center, Virginia Tech, National Capital Region, Middleburg, VA
    Current affiliation:
    1. Large Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing, MI
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  • F. Elvinger

    1. Department of Large Animal Clinical Sciences, Virginia-Maryland Regional College of Veterinary Medicine (VMRCVM), Virginia Tech, Blacksburg, VA
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Corresponding author: C.D. Thatcher, Arizona State University, 500 N. 3rd Street, Phoenix, AZ 85004-0469; e-mail: craig.thatcher@asu.edu

Abstract

Background

The prevalence of obesity in horses in the eastern United States is not well documented.

Objective

To determine body condition and risk factors for obesity in horses in Southwest Virginia during summer.

Animals

A sample of 300 mature (4–20 years old), light breed horses (140 mares, 151 geldings, and 9 stallions) from the VMRCVM Equine Field Service practice equine database. The horses were from 114 farms and 138 owners.

Methods

Horses were evaluated over a 60-day period in this cross-sectional, prospective study. A questionnaire was completed for each horse. Body condition score (BCS) was assigned using a scale of 1 (emaciated) to 9 (obese) by 2 independent scorers. Morphometric measurements included average neck circumference (ANC), girth, body length, and height at the withers. Horses were categorized based on BCS as underconditioned (BCS < 4), optimal condition (BCS 4–6), overconditioned (BCS 7), and obese condition (BCS 8–9).

Results

Five horses (1.7%) were underconditioned, 142 horses (47.3%) were optimally conditioned, 97 horses (32.3%) were overconditioned, and 56 (18.7%) were obese. Estimated body weight (EBW) (r = 0.14, P = .015), body mass index (BMI) (r = 0.46, P < .001), and neck circumference to height ratio (NCHR) (r = 0.50, P = .001) increased with increasing BCS.

Conclusions and Clinical Importance

The prevalence of overconditioned and obese horses in this population was higher than reported in previous studies and indicates that obesity might be an emerging problem in horses.

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