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A new study reveals that the main cause of racetrack fatalities in horses racing in Norway and Sweden is sudden collapse, not catastrophic injury, as was previously suspected.

Dr. Ingunn Risnes Hellings and a research team looked at fatalities recorded by the Norwegian and Swedish Trotting Associations from Jan. 1, 2014, to Dec. 31, 2019; 48 horses died during this period—38 Standardbreds and 10 Norwegian-Swedish Coldblooded Trotters. The scientists looked at breed, age, sex, frequency of starts, time of year, and racing distance in an attempt to identify risk factors. They also noted whether the horse competed in a trotting race under saddle or in harness.

Fatalities were included in the study if the horse was euthanized after becoming injured immediately before the race, during the race, or within an hour of racing.

The researchers found that 14.5 percent of fatalities were from traumatic or orthopedic injuries, while the rest were considered “sudden athletic death.” This is a distinct difference from the primary cause of racetrack fatalities in Thoroughbred racehorses, in which most suffer catastrophic orthopedic injuries. Sudden athletic death in Thoroughbreds occurs at a rate of between 9 and 19 percent.

The team also found:

A higher number of starts in the last 30 days increased risk of sudden death
30 horses died of acute circulatory collapse due to cardiac or pulmonary failure
10 horses died from hemorrhaging after blood vessel rupture
Seven of the 48 study horses were euthanized because of catastrophic injury
70 percent of the 40 horses in the sudden athletic death category had marked bleeding in the lungs
The rate of sudden athletic death was similar between both breeds

The scientists determined that the rate of catastrophic injury fatalities was comparatively low and that suspected or confirmed cardiopulmonary causes of death were similar to previous studies. They note that additional investigation into the pathologies causing the cardiopulmonary events is warranted.

Read the full study here.

Read more at HorseTalk.

The post Study: Racetrack Fatalities In Sweden, Norway Often Result Of Sudden Collapse appeared first on Horse Racing News | Paulick Report.

Source of original post

Selecting and fitting a bit to an individual horse and then using it skillfully and sympathetically serve as hallmarks of nuanced horsemanship, no matter the discipline. When mouth injuries directly related to bitting occur, even the most conscientious of horsemen are often baffled by their appearance. Researchers attempted to pinpoint the root cause of these injuries in a recent study of harness racehorses.^* Should the blame be assigned to specific bits, other pieces of common equipment, or race performance?

Researchers examined the mouths of 261 trotters, including 151 Standardbreds, 78 Finnhorses (a native lightweight draft), and 32 ponies, for bruises and wounds immediately following a race. They looked at specific bit-contact areas: the inner and outer corners of the lips, bars of the lower jaw, cheek tissue near the second premolar tooth, tongue, and roof of the mouth.

The researchers then collected information about the type of bit used for each horse, making special note of the thickness and composition of the mouthpiece. Details of other equipment were taken, when applicable, including the use of an overcheck, jaw strap, or tongue-tie. Past racing history was mined from a reliable online database.

Injuries were observed in 84 percent of the horses in the study, regardless of the type of bit worn, and half of those were classified as moderate or severe. Five horses (2 percent) had visual blood outside of the mouth from the wounds.

Compared with horses wearing a single-jointed, half-cheek snaffle, trotters that wore a Crescendo bit, Mullen-mouth regulator bit, or a straight plastic bit had a greater likelihood of moderate or severe injury to the mouth. Bar lesions were more common in horses outfitted with unjointed bits. Other tack and race performance did not factor into risk for oral lesions, according to the researchers.

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“While this study serves to highlight the physical injuries caused by bits among specific high-performance horses, it is important to note that lesions may be severe enough to hinder comfortable chewing of forages, especially if hay or chaff is stemmy,” said Catherine Whitehouse, a nutritionist with Kentucky Equine Research. This in turn could affect forage consumption, leading to diminished body condition, onset of gastric ulcers, and loss of performance.

Further, mouth pain can be a source of worry or stress for horses, even while resting. “Racehorses have a high incidence of gastric ulceration, the effects of which can be assuaged by conscientious management, which may include the use of research-proven digestive supplements,” Whitehouse said.

^*Tuomola, K., N. Mäki-Kihniä, A. Valros, and A. Mykkänen. 2021. Risk factors for bit-related lesions in Finnish trotting horses. Equine Veterinary Journal 53:1132-1140.

Tag: harness horse

Study: Racetrack Fatalities In Sweden, Norway Often Result Of Sudden Collapse

Bit-Related Injuries In Harness Racehorses