Indicators of good equine health – part two

Health is one of the components used in horse welfare studies to assess horse well-being. Health encompasses several factors, including avoiding injuries, illnesses, and pain. Pain can result from injury or illness, but it can also be caused by the equipment that is being used on the horse. Pain is one of the most significant negative experiences that impair welfare. More information about injuries, illnesses, and pain can be found here.

Pain Due to Equipment and Practices

Abnormal behavior during saddling, bridling, and harnessing is generally associated with pain. Typical pain behaviors in these situations include chewing on the bit, pinning the ears back, swishing the tail, or attempting to bite the handler. Tack-related stress behaviors, such as shaking the head or sticking out the tongue may also occur.  Restless movement during tightening of the girth is also typical stress behavior. This kind of behavior indicates that the horse has learned to associate tacking up with something negative, usually causing it pain. These are not normal behavioral patterns but indicators of compromised welfare.

Abnormal behavior during tacking up is usually connected to pain or discomfort. © M. Lüscher

Saddle

For ridden horses, the saddle is one of the most common causes of back pain. The saddle should fit the horse’s back and remain almost motionless in all gaits. Its weight should be evenly distributed over the horse’s back so that there is no pressure on the spinal area. Additionally, the saddle should also fit the rider to maintain balance and alignment when sitting on the horse’s back.

Oral Injuries

Most horses exhibit behaviors related to discomfort when a bit is placed in their mouths. The use of bits may indeed pose a greater welfare challenge than previously thought. It is also noteworthy that most pain-related behaviors associated with bit use likely go unnoticed by riders or handlers.

In studies conducted by Kati Tuomola, in over half of the trotting and cross-country horses examined were found to have oral injuries caused by bits. The prevalence of oral injuries depended on the type of bit used. The most injuries occurred in trotting horses using straight bar bits. Also, the tightness of the noseband affects the formation of oral injuries. Horses ridden with a tight noseband (less than 2 cm from the nasal bone) were up to three times more likely to have oral injuries than horses ridden with a looser (over 3 cm from the nasal bone) noseband.

Bit related oral injuries depend on the bit type and the tightness of the nose band. © S. Bonnié

Measuring Pain Caused by Equipment Use

When improperly used, almost all equipment can cause pain to horses. When assessing equine welfare, it is useful to determine what equipment and in what situations it is used. Generally, a horse’s pain expressions provide more information about its current state than its behavior, because behavior can be influenced by training. It should be remembered that even though a horse does certain things, it may still find them unpleasant or painful. Riders, handlers, and grooms can influence the pain experienced by horses through their choices and management practices. Part of their expertise includes recognizing behaviors in horses that cause pain or are disliked and avoiding them to improve horse welfare.


References

Dittmann, M. T., Arpagaus, S., Hungerbühler, V., Weishaupt, M. A., & Latif, S. N. (2021). “Feel the Force”—Prevalence of Subjectively Assessed Saddle Fit Problems in Swiss Riding Horses and Their Association With Saddle Pressure Measurements and Back Pain. Journal of equine veterinary science, 99, 103388–103388. https://doi.org/10.1016/j.jevs.2021.103388

Dyson, S., Bondi, A., Routh, J., Pollard, D., Preston, T., McConnell, C., & Kydd, J. H. (2022). An investigation of behaviour during tacking‐up and mounting in ridden sports and leisure horses. Equine veterinary education, 34(6), e245–e257. https://doi.org/10.1111/eve.13432

Dyson, S., Carson, S., & Fisher, M. (2015). Saddle fitting, recognising an ill-fitting saddle and the consequences of an ill-fitting saddle to horse and rider. Equine veterinary education, 27(10), 533–543. https://doi.org/10.1111/eve.12436

Eisersiö, M., Yngvesson, J., Byström, A., Baragli, P., & Egenvall, A. (2021). A rein tension signal can be reduced by half in a single training session. Applied animal behaviour science, 243, 105452. https://doi.org/10.1016/j.applanim.2021.105452

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McGreevy, P., McLean, A., Buckley, P., McConaghy, F., & McLean, C. (2011). How riding may affect welfare: What the equine veterinarian needs to know. Equine veterinary education, 23(10), 531–539. https://doi.org/10.1111/j.2042-3292.2010.00217.x

McGreevy, P., Warren-Smith, A., & Guisard, Y. (2012). The effect of double bridles and jaw-clamping crank nosebands on temperature of eyes and facial skin of horses. Journal of veterinary behavior, 7(3), 142–148. https://doi.org/10.1016/j.jveb.2011.08.001

Mellor, D. J. (2020). Mouth Pain in Horses: Physiological Foundations, Behavioural Indices, Welfare Implications, and a Suggested Solution. Animals (Basel), 10(4), 572. https://doi.org/10.3390/ani10040572

Mellor, D. J., & Beausoleil, N. J. (2017). Equine Welfare during Exercise: An Evaluation of Breathing, Breathlessness and Bridles. Animals (Basel), 7(6), 41. https://doi.org/10.3390/ani7060041

Squibb, K., Griffin, K., Favier, R., & Ijichi, C. (2018). Poker Face: Discrepancies in behaviour and affective states in horses during stressful handling procedures. Applied animal behaviour science, 202, 34–38. https://doi.org/10.1016/j.applanim.2018.02.003

Tuomola, K., Mäki-Kihniä, N., Kujala-Wirth, M., Mykkänen, A., & Valros, A. (2019). Oral Lesions in the Bit Area in Finnish Trotters After a Race: Lesion Evaluation, Scoring, and Occurrence. Frontiers in Veterinary Science, 6. https://www.frontiersin.org/article/10.3389/fvets.2019.00206

Tuomola, K., Mäki-Kihniä, N., Valros, A., Mykkänen, A., & Kujala-Wirth, M. (2021a). Bit-Related Lesions in Event Horses After a Cross-Country Test. Frontiers in veterinary science, 8, 651160–651160. https://doi.org/10.3389/fvets.2021.651160

Tuomola, K., Mäki-Kihniä, N., Valros, A., Mykkänen, A., & Kujala-Wirth, M. (2021b). Risk factors for bit-related lesions in Finnish trotting horses.

Uldahl, M., & Clayton, H. M. (2019). Lesions associated with the use of bits, nosebands, spurs and whips in Danish competition horses. Equine veterinary journal, 51(2), 154–162. https://doi.org/10.1111/evj.12827