Grass's (Missing) Link to Laminitis: Hormonal Imbalance Sets the Stage for Disease

For years, laminitis has been characterized as a disease of the horse's foot. Treatment has centered on relieving pain to the foot and facilitating healthy new growth. But just as important is understanding what caused the laminitis to occur and treating laminitis as a disease of the entire horse, not just the feet. (HC Biovision photo of a laminitis-ravaged horse foot by Dr. Christoph von Horst)

Just when you thought laminitis research was starting to make some sense, the landscape changes. If you haven't been keeping up with laminitis research for the past few years, you've missed grass being given a get-out-of-jail-free card for its lack of a direct role in causing laminitis.

Equine Obesity Update: Do Horse Owners Comprehend the Dangers?

14 November 2009 Fran Jurga's Hoof Blog at Hoofcare.com



There's no doubt that the horseowning public in the United States and abroad is becoming more aware of the problem of obesity in horses. Just look at the variety of new feed products and supplements designed to help horses lose weight, and you will see just the first wave of a marketing tsunami aimed at assisting horse owners in reducing the weight of the horses.

The problem may not lie in just recognizing obesity, however. For many horse owners, telling them their horses are fat is akin to telling them that they have spoiled a child with candy. In their eyes, fat horse is a sign of a well-fed and much loved horse, but they may not connect the dots to the real health risks associated with obesity, such as insulin resistance and a high risk for laminitis.

In this video, the British international charity World Horse Welfare updates us on their progress in educating horse owners and also in surveying horse owners for their perceptions of obesity in horses. You'll also see a severely overweight pony that was confiscated by officials as a welfare case because of its obesity. This was the first prosecution of horse owners for welfare violations directly related to overfeeding a horse.

I love the last part, where the pony stands next to a pile of bags of feed equal to the weight he has lost.

Thanks in advance for sharing this video and keeping public awareness of the dangers of equine obesity at the forefront.

© Fran Jurga and Hoofcare Publishing. Please, 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.

Laminitis: Obese Horses and Ponies in Greater Danger

by Fran Jurga | 7 May 2009 | Fran Jurga's Hoof Blog

A British study has examined the factors that affect the likelihood of recovery from grass-related laminitis, and concluded that obese horses are more likely to die.

In the study, members of the British Equine Veterinary Association (BEVA) documented cases over four years and found that when overweight horses develop grass-related laminitis, they tend to have more severe signs than those of optimal weight.

Reporting on the study conclusions, principal investigator and veterinary surgeon Celia Marr said “When (grass-related) laminitis does occur, overweight animals are more likely to die of the disease than their thinner counterparts. The animals with the best outcome tended to be those that had received acepromazine, a drug that improves the blood supply to the feet and relaxes the animal."

Marr's advice to horse owners: "Horse owners and vets are encouraged to ensure that horses and ponies are not allowed to become excessively fat as this can have a significant effect on their health, as we have seen in this study.”

Summary points of the study:

1. 107 cases of acute pasture-associated laminitis were recruited from first-opinion veterinary practices to study factors associated with clinical severity, survival and return to ridden exercise.

2. Of the horses in the study, 83 percent were overweight and there was a trend towards severe laminitis cases having a higher Body Mass Index (BMI).

3. Eight weeks after disease onset, 95% were alive.

4. Lower body weight, optimal body condition, mild rather than severe laminitis and acute/chronic founder were significantly associated with survival.

5. The clinical outcome was judged by a panel of three veterinarians as good in 72% of cases.

6. The clinical outcome was significantly associated with horse type; outcome was bad in none of the small horses compared with 34.1 percent of large ponies/cobs, 32.4 percent of small ponies and 30.0 percent of large horses.

The study was sponsored by the British Veterinary Association Animal Welfare Foundation (BVA AWF) and Merial Animal Health.

Hoof Blog note: Please remember that this study relates only to horses with pasture-type laminitis. There are several types of laminitis and perhaps one thing this study does is accentuate the differences in expectations that horse owners may have in their horses' recovery chances.

© 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.