Prospective study of equine colic risk factors.

This research paper examines potential causes of colic in horses over a one-year study period. The study found that factors such as a horse’s age, prior history of colic, alterations to feeding practices, and vaccinations all had significant impacts on the likelihood of colic occurrence.

Study Approach

• The researchers conducted a one-year prospective study covering 31 horse farms randomly selected from lists in Virginia and Maryland, USA. The main objective was to identify various risk factors contributing to equine colic.
• Different factors were first examined via univariate statistical analysis to identify potential associations of colic at both farm and individual horse level. These factors related to the farm’s management, the horses’ housing and pasture conditions, use, nutrition, health, and specific event factors.

Statistical Analysis and Results

• Variables that proved significant in the initial univariate analysis were further analyzed using stepwise multivariable forward logistic regression. The cut-off for significance was P ≤ 0.25 for farm factors and P ≤ 0.10 for horse factors.
• The analysis revealed no significant factors at the farm level. However, several horse-level variables stood out as significant predictors for equine colic. These included horses’ ages (with higher odds for horses between 2-10 years), prior history of colic, changes in concentrate feeding during the year, high levels of concentrate feeding, and vaccination with a monocytic ehrlichiosis vaccine.
• On the other hand, feeding whole grain, either by itself or alongside other concentrate components, appeared to reduce the risk of colic.

Conclusions

• The results of this study suggest that diet changes and overall dietary practices significantly influence the risk of colic in horses. As such, proper feeding, management, and preventative health measures (like optimum vaccination) are crucial in mitigating this risk.