Horses That Pass In-Hand Inspection May Not Complete XC Phase Of Eventing

A recent study has used a horse-behavior scale to identify high-level event horses at risk of poor cross-country performance. Drs. Sue Dyson and Andrea Ellis completed two studies: one was a preliminary study that used 35 horses competing on the second day of dressage at the 2018 Burghley CCI 4*. The main study used 70 horses warming up for dressage at the 2019 Badminton CCI 5* horse trials and 67 horses warming up for dressage at the 2019 Burghley horse trials.

Each horse was observed for between 10 and 12 minutes by Dr. Sue Dyson while they warmed up. She then she applied the Ridden Horse Pain Ethogram (RHpE) to determine if the horse was pain-free and recorded her findings. The RHpE uses 24 behaviors to determine if a horse is experiencing musculoskeletal discomfort.

The behaviors include tilting the head, swishing the tail, staring for more than five seconds, spooking, rearing, bucking, exposing the tongue, moving the ears back for more than five seconds, clamping the tail or opening the mouth and separating the teeth for more than 10 seconds.

A horse that exhibits at least eight of the behaviors is believed to have a musculoskeletal issue. The more behaviors he shows, the more pain he is most likely experiencing. The most frequent score a non-lame horse garners is 2 out of 24; the study shows that a score of seven or more in four- and five-star equine competitors was more reliable to identify horses whose performance may be impaired because of pain.

The duo then compared RHpE scores for the competition horses to final results in terms of dressage penalties, cross-country performance, showjumping penalties and final placings. They found a moderate correlation between dressage penalty scores and the RHpE score; the correlation was much more pronounced in the cross-country phase: 10 of the 17 horses (59 percent) with an RHpE score of 7 or more failed to finish the cross-country phase; 39 out of 117 horses (33 percent) with a score below 7 failed to finish.

The team found no relationship between the RHpE score and showjumping performance. However, there was a significant relationship between total RHpE score and final horse placings, with horses having higher RHpE scores being placed lower than horses with low RHpE scores.

The scientists concluded that top-level competition horses at three-day events can pass the preliminary in-hand horse inspection, but show signs of lameness when ridden and demonstrate the behavioral changes assessed with the RHpE. Though there are many reasons a horse-and-rider team may not complete the cross-country phase of eventing competition, there is a strong correlation between horses that exhibit behaviors on the RHpE and a failure to complete. This indicates that underlying musculoskeletal discomfort may be a contributory cause to not finishing the cross-country phase of eventing.

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Read more at HorseTalk.

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Majority Of Equine Owners Cannot Detect Lameness

A new study shows that the vast majority of horse owners cannot determine if a horse is lame under saddle. However, scientists note that owners who pay close attention to equine behavior may pick up on clues that the horse is in pain even if they can't determine if it's lame while being ridden, reports The Horse.

The ridden horse pain ethogram (RHpE) is a list of 24 behaviors that have been scientifically confirmed to relate to pain; when the pain is removed, the behaviors disappear. The behaviors include things like pain-related facial expressions and pinning of the ears for at least five seconds. Lame horses showed at least one-third of the behaviors included in the ethogram.

Dr. Sue Dyson and a team of scientists applied the ethogram to 60 riding horses in the United Kingdom. The horses were given lameness exams and checked for saddle fit. They were then assessed for the presence of absence of the 24 behaviors listed in the ethogram while being ridden by their regular riders; all riders believed their horses were sound.

The study showed that 73 percent of the horses showed subtle, intermittent lameness in one or more legs; more than 50 percent of horses demonstrated a gait abnormality like bunny hopping or not stepping underneath themselves at the canter.

Lameness was strongly linked to a RHpE score of eight or more. The most-common behaviors included pinning the ears for at least five seconds, staring intently for at least five seconds, dragging the back feet or stumbling repeatedly.

Dyson says that riders missing lameness in their horses is not indicative of lack of attention, but more reflective of their lack of training in recognizing pain-related behaviors. Riders who learned to ride in lesson programs may have always ridden horses that were exhibiting pain-related behaviors, but were not taught that the behaviors indicated discomfort.

Dyson says owners and riders must become more educated to recognize pain-related behaviors and understand that the demonstration of eight or more of the behaviors indicated that the horse is in pain.

Read more at The Horse.

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