Horse Shivers Syndrome: A Welfare Challenge

Shivers is a progressive neuromuscular disorder in horses causing involuntary hindlimb trembling and flexion, creating significant welfare impacts as the condition advances.

Key Facts

Shivers affects an estimated 2-5% of horses in some breed populations
Draft breeds and Warmbloods are more commonly affected
The condition typically worsens over time and cannot be cured
High-starch diets may exacerbate symptoms while low-starch diets may help
Affected horses struggle with backing, hoof picking, and trailer loading
The underlying cause is not fully understood but involves cerebellar changes

Welfare Considerations

Horses with shivers experience involuntary muscle contractions that interfere with normal movement and make routine care distressing. Hoof care becomes difficult as affected horses cannot easily hold up their hind feet, creating welfare challenges for both horse and farrier. The progressive nature means horses may eventually be unable to perform work they previously enjoyed. Owners and veterinarians must balance managing current quality of life against the inevitable progression of this condition.

What You Can Do

Work with your vet to implement a low-starch, high-fat diet that may reduce symptoms
Provide adequate exercise appropriate to your horse's current ability level
Find a farrier experienced with horses that cannot hold up hind feet
Monitor progression carefully and adjust management as the condition advances
Support research into the underlying mechanisms and potential treatments for shivers