California Statistics Reveal Dangerous Trend in Hind Limb Breakdowns on Artificial Tracks

by Fran Jurga | 28 August 2009 | Fran Jurga's Hoof Blog

Data on racing breakdowns compiled by the University of California at Davis tracks the incidence of injuries, the seasonality of injuries and which limb is affected, among many other data points recorded. A publication of recent statistics presented to the California Horse Racing Board (CHRB) reveals a disturbing prevalence of hind limb injuries that led to the death of racehorses last year.

While the report is not available at present, the Los Angeles Times today reported that the study presented to the CHRB yesterday reveals that 19 horses died on California tracks from hind limb injuries in 2008, and that those injuries were split pretty evenly between left and right hinds. Only one horse died from a hind limb injury on a dirt track.

Breakdowns on the front limbs were somewhat more comparable between dirt and artificial tracks, but the artificial breakdowns still exceeded the dirt tracks: 74 horses broke down in front on artificial tracks while 59 broke down in front on dirt tracks.

Some people feel that this is an invalid comparison, and that trainers will often work a horse on a synthetic track that they would not work on a dirt track.

UC Davis examined 351 cadavers of breakdowns in its search for new insights into why racehorses are so susceptible to fatal injuries.

California has a 4 mm limit on toe grabs on front shoes and allows horses to run barefoot.

© Fran Jurga and Hoofcare Publishing. No use without permission. You only need to ask. Fran Jurga's Hoof Blog is a between-issues news service for subscribers to Hoofcare and Lameness Journal. This blog may be read online at the blog page, checked via RSS feed, or received via a digest-type email (requires signup in box at top right of blog page). To subscribe to Hoofcare and Lameness (the journal), please visit the main site, www.hoofcare.com, where many educational products and media related to equine lameness and hoof science can be found. Questions or problems with this blog? Send email to blog@hoofcare.com.

Turfway Park Brings Back Toe Grabs on Hind Shoes After Eight Horses Break Down in December

You know those hind shoes you just threw away? Most of the shoes in this pile are old draft horse shoes with holes where removable calks could be applied for icy streets.

Just when you think you have things figured out...

Turfway Park in Florence, Kentucky runs Thoroughbreds over a Polytrack (artificial) surface that has been in place since 2005. After a new policy went into place in September that banned all but the flattest horseshoes on front and hind feet, the track was a model for reform and safety. Then the calendar turned to December: Turfway reported breakdowns that caused the death of eight horses, most of whom injured the left front leg.

Are the breakdowns related to the shoe changes? It's impossible to tell but one theory is that a slipping hind foot puts more stress on the opposite front. This is still a brainteaser, though, since the foot slips less in Polytrack than on dirt, such as you'd find at Churchill Downs.

Whether as a result of the breakdown or in deference to trainers wishes, Turfway has announced a policy change on shoes. While flat shoes are still required on front feet, toe grabs no higher than 1/4" are allowed on racing and training horses as of the first of January.

Here's the new rule:

Shoe Policy for Turfway Park

Effective January 1, 2009, the following shoe policy will govern racing and training at Turfway Park

Prohibited – Front and Hind
The following devices are prohibited both front and hind for racing and training at Turfway Park: turn-downs, bends, jar calks, stickers and any other traction device worn on the shoes of Thoroughbred horses.

Acceptable – Front
The following front shoes are acceptable for racing and training at Turfway Park: Queen's Plate, Queen's Plate XT, King's Plate, King's Plate XT, Fast Break, Speed Toe, and Outer Rim.

Acceptable – Hind
Hind shoes with a toe grab not exceeding one-quarter inch (1/4") shall be permitted for racing and training at Turfway Park.

Could the same shoe modification believed to cause injury and strain to the front legs actually be of benefit to the hind legs? Time for more research...and keep those new shoe designs coming.

© Fran Jurga and Hoofcare Publishing. No use without permission. You only need to ask. Fran Jurga's Hoof Blog is a between-issues news service for subscribers to Hoofcare and Lameness Journal. This blog may be read online at the blog page, checked via RSS feed, or received via a digest-type email (requires signup in box at top right of blog page). To subscribe to Hoofcare and Lameness (the journal), please visit the main site, www.hoofcare.com, where many educational products and media related to equine lameness and hoof science can be found. Questions or problems with this blog? Send email to blog@hoofcare.com.