Hahnentritt – the restless foot

This condition, which has been known since the Middle Ages, is a movement disorder that exclusively affects the hind legs of horses. When the horse is being presented, one or both hind legs are bent excessively and jerkily so that the fetlock almost touches the belly and is then brought down again just as abruptly. The staccato gait is reminiscent of a rooster strutting, which is where the name comes from.

INHALT
Causes Symptoms Diagnosis Treatment and prognosis
Causes

There is still no precise scientific explanation for the causes of "true chickenpox." Inflammatory changes in the nerves of the hind limbs and spinal cord are being discussed. This damage is thought to cause a reduction in inhibitory impulses, which in turn leads to the severe overreaction. A second form, known as "Australian rooster's foot," also referred to as toxic rooster's foot, can be traced back to the ingestion of certain plants and usually affects both hind limbs and several horses in a herd.

Symptoms

A characteristic symptom of this disease is jerky, excessive bending of the hind limbs and a resulting stabbing gait. The symptoms are exacerbated in tight turns and when moving backwards. This movement disorder usually occurs abruptly and is mainly observed at a walk and sometimes also at a trot; affected horses usually show no impairment when galloping.

Horse with rooster's comb
Horse with hind leg raised
Diagnosis

The appearance of the rooster's comb is typical and therefore allows for a quick diagnosis. The only conditions that need to be ruled out are rooster's comb-like symptoms, which can occur with spavin and patella displacement, and shivering syndrome.

Treatment and prognosis

There is no sure cure for true laminitis. In some horses, the symptoms only appear at the beginning of movement and disappear on their own after 5-10 minutes. Medication is limited to preparations that relax the muscles and vitamins that help keep the nerves healthy. Your veterinarian will decide which remedy is best for your horse on a case-by-case basis.

If medication does not work, your veterinarian may recommend surgery. There are various surgical options available, but none of them guarantee a complete cure. It is possible to remove parts of the tendon of the lateral toe extensor or to remove it completely. However, before surgery, the veterinarian must clarify whether it is a symptomatic rooster step.