Relationships Between Measurements of Body Fat in Thoroughbred Horses.

This research evaluates four different methods of measuring body fat in Thoroughbred horses. The study found that the body condition score (BCS) remains a simple and effective way to monitor fat levels in mature horses in moderate condition. Fat deposits around the tailhead may be useful for tracking fat changes in horses with a BCS above 5, but further investigation is needed.

Research Objective and Methods

• The primary aim of the study was to compare four different techniques for estimating body fat levels in Thoroughbred horses. This was done to monitor the effectiveness of weight change regimes for horses that have been diagnosed with obesity or are considered too thin.
• The four techniques evaluated include body condition score (BCS), morphometric measurements, ultrasonic measures of subcutaneous fat depots, and calculating total body fat through deuterium oxide dilution.
• The research involved 14 mature Thoroughbred horses, whose body condition scores ranged from 4.5 to 6.5 on a 9-point scale.

Research Findings

• The results indicated strong positive correlations among BCS, the ratio of heart girth to body weight, and estimated total body fat. These correlations were statistically significant (P < .05).
• The study also found that the subcutaneous fat depth around the tailhead tended to be positively related to body fat when only considering horses with a BCS equal to or greater than 5. This trend was not statistically significant (P = .0680) but was considered to be a meaningful pattern worth further investigation.

Conclusion and Suggestions for Future Research

• The study concludes that body condition score remains a reliable and straightforward method for monitoring body fat in mature horses that are in moderate condition.
• However, measurements of fat deposits around the tailhead might be useful for tracking fat changes in horses with a BCS over 5. Even though the current study did not find a statistically significant correlation, the observed trend suggests that this could be a promising approach to keep track of body fat changes in these horses.
• The researchers recommend further studies with a larger sample of horses with higher levels of adiposity (higher BCS) and collected data at different times of the year to evaluate the seasonal effect on body fat accumulation in horses.