Cross-stiffness – proper prevention and treatment

The weather is beautiful this weekend and you are going for a long ride on your horse. But right at the start of the first gallop, the horse suddenly becomes very stiff and starts sweating unusually heavily. It hardly wants to move and is pressing its back down. However, these signs seem too severe for simple muscle soreness, especially since you haven't done anything with the horse in the last few days. Avoid any further movement of the horse and always contact a veterinarian immediately in such cases, as the symptoms described above are very painful and may be the first signs of a cross-ties. As this muscle disease occurs frequently after horses have not been worked for one or more days with the same feed ration, it is also known as "holiday sickness" or "Monday morning disease." However, horses that are worked regularly can also fall ill. Young horses of heavy breeds are particularly at risk. This disease was greatly feared in the days when carriage and work horses were heavily used. Today, it only occurs sporadically, mostly in easy-to-feed horses with good nutritional status.

INHALT
Causes and development Symptoms Therapy Forecast Prevention – but how?
Causes and development

Cross-tie syndrome is a metabolic disorder. During prolonged periods of rest with a carbohydrate-rich diet, the horse's muscles build up an energy reserve called glycogen. When you start moving the horse again, the glycogen is broken down by the muscles with the help of oxygen. If there is too much glycogen, not enough oxygen is available for breakdown and breakdown products such as lactate accumulate in the muscles. This accumulation is exacerbated by cool outside temperatures due to the resulting poor blood circulation, as less lactic acid can be transported away. The muscles become acidic, cramp up, and, as this progresses, muscle cells can be destroyed and the muscle protein myoglobin can be released.

Symptoms

In typical cases, the first symptoms appear within the first quarter of an hour after the horse starts moving. The horse begins to tremble, sweat, and walk stiffly or even stop moving altogether. The back is arched, the front legs are pushed forward, and the hind legs are pushed far back. This "sawhorse stance" is characteristic of cross-ties. If movement is not stopped immediately, the hindquarters may buckle and the horse may fall. If the heart muscle is affected, an increased heart rate and cardiac arrhythmia may occur. The back, croup, and thigh muscles are severely hardened and painful. Another very noticeable symptom is the brownish discoloration of the urine, which is caused by the breakdown of myoglobin.

The disease is extremely painful for the animal and requires immediate veterinary treatment. In addition to assessing the typical symptoms, a blood test is the best way for the veterinarian to confirm the diagnosis.

Diagram of horse musculature
1 Large back muscle | 2 Lumbodorsal fascia | 3 Thigh fascia stretcher | 4 Superficial croup muscle | 5 Semitendinosus muscle | 6 Biceps femoris muscle | 7 Thigh fascia
Therapy

The most important immediate measure is to prevent the affected horse from moving in order to prevent its condition from worsening. The muscles can be stimulated to improve blood circulation by covering the horse and rubbing it down. This supports oxygen supply and the removal of harmful substances.

Veterinary treatment will attempt to prevent further muscle damage. To this end, metabolism and kidney function are stabilized by administering fluids via infusion. Painkillers and antispasmodics may also be used. Your veterinarian will decide on the exact procedure on a case-by-case basis. Only when the horse is completely calm can it be carefully led back to the stable or transported.

Forecast

The extent to which complete healing occurs depends very much on the severity and extent of the disease and, in particular, on whether the horse's movement was stopped immediately when the first symptoms appeared. In mild cases and with immediate treatment, complete relief of symptoms without any lasting damage can be expected after 12 to 24 hours. Even if the animal is lying down but is able to stand up alone or with assistance on the second or third day after treatment, there is a good chance of recovery. If there is significant muscle damage, the healing phase can be considerably longer. Incomplete healing with long-term effects in the form of muscle atrophy (muscle wasting) and permanent lameness is also possible. Affected animals tend to relapse.

In extremely severe cases, if no attempts to stand up are made after three days, the chances of recovery are very poor, as too much of the muscle tissue has already been irreparably damaged.

Prevention – but how?

The incidence of the disease has already declined significantly in recent years thanks to improved husbandry and training conditions. Nevertheless, certain factors are known to promote the development of cross-tie syndrome. So what can I do as a horse owner to eliminate these factors? The basis of good prevention is feeding your horse a diet that meets its needs, with sufficient roughage, which should always be adjusted to suit the horse's daily workload.

Make sure your horse gets the same amount of exercise every day. If this is not possible, reduce the amount of concentrated feed. Don't expect your horse to run a marathon if it has had a long break from training. Always make sure your horse warms up properly and increase the workload gradually so that you can enjoy your next ride with your horse without any problems!