Shivering in Horses – Overview
Symptoms, Causes, Risk Groups and Management
Shivering is a chronic neuromuscular disorder in horses, characterized by involuntary muscle tremors and spasms, particularly in the hind limbs. While it may resemble cold-induced shivering, this condition has neurological origins and can significantly affect a horse’s mobility and comfort.
Symptoms
- Involuntary trembling or jerking of the hind legs
- Elevated and twitching tail
- Difficulty when backing up
- Resistance to lifting hind legs, complicating farrier work
- Muscle atrophy in advanced stages
Symptoms often worsen during stress, excitement, or after prolonged periods of inactivity.
Causes
The exact cause of shivering is not fully understood, but research points to abnormalities in the cerebellum – the part of the brain responsible for motor control. Damage to Purkinje cells is believed to disrupt coordination and lead to the typical symptoms of shivering.
At-Risk Horses
The condition is more common in certain groups of horses, including:
- Taller horses, especially over 16.3 hands
- Draft breeds, Warmbloods, and Thoroughbreds
- Geldings – up to three times more often than mares
- Horses between the ages of 2 and 7
Studies suggest that height and breed may be linked to a genetic predisposition for shivering.
Management and Relief
There is currently no cure for shivering, but with proper care and routines the symptoms can often be alleviated. Strategies that may help include:
- Gentle and consistent exercise to maintain coordination and muscle strength
- Daily turnout to reduce stiffness from stabling
- A calm, low-stress environment with clear routines
- A balanced diet and supplements that support the nervous system and muscles
Many horses benefit from the right combination of exercise, environment, and nutritional support. Tracking progress over time can also help adjust the care plan as needed.
Always consult a veterinarian for an accurate diagnosis and to develop a tailored management strategy for your horse’s well-being.
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