Nutrition

Research performed at the University of Pennsylvania School of Veterinary Medicine showed that if during cold weather horses have only warm water available, they will drink a greater volume per day than if they have only icy cold water available. But if they have a choice between warm and icy water simultaneously, they drink almost exclusively from the icy and drink less volume than if they have only warm water available. The take home message is this: you can increase your horse’s water consumption by only providing warm water. This can be accomplished either by using any number of bucket or tank heaters or by adding hot water twice daily with feeding. Another method to encourage your horse to drink more in winter (or any time of the year) is to topdress his feed with electrolytes.

Exercise

It may be tempting to give your horse some “down-time” during winter, but studies have found that muscular strength, cardiovascular fitness and overall flexibility significantly decrease even if daily turnout is provided. And as horses grow older, it takes longer and becomes more difficult each spring to return them to their previous level of work. Unfortunately, exercising your horse when it’s cold and slippery or frozen can be challenging.

First, work with your farrier to determine if your horse has the best traction with no shoes, regular shoes, shoes with borium added, shoes with “snowball” pads, or some other arrangement. Do your best to lunge, ride or drive in outside areas that are not slippery. Indoor arenas can become quite dusty in winter so ask if a binding agent can be added to hold water and try to water (and drag) as frequently as the temperature will permit. Warm up and cool down with care. A good rule of thumb is to spend twice as much time at these aspects of the workout than you do when the weather is warm. And make sure your horse is cool and dry before turning him back outside or blanketing.

Blanketing

A frequently asked question is: does my horse need a blanket? In general, horses with an adequate hair coat, in good flesh and with access to shelter probably do not need blanketed. However, horses that have been clipped, recently transported to a cold climate, or are thin or sick may need the additional warmth and protection of outerwear.

Horses begin to grow their longer, thicker winter coats in July, shedding the shorter, thinner summer coats in October. The summer coat begins growing in January with March being prime shedding season. This cycle is based on day length—the winter coat is stimulated by decreasing daylight, the summer coat is stimulated by increasing daylight. Owners can inhibit a horse’s coat primarily through providing artificial daylight in the fall but also by clothing their horse as the temperature begins to fall. If the horse’s exercise routine in the winter causes him to sweat and the long hair hampers the drying and cooling down process, body clipping may be necessary. Blanketing is then a must.

Health

There are a number of health conditions that seem to be made worse by the winter environment. The risk of impaction colic may be decreased by stimulating your horse to drink more water either by providing warm water as the only source or feeding electrolytes. More time spent inside barns and stalls can exacerbate respiratory conditions like “heaves” (now called recurrent airway obstruction), GI conditions like ulcers, and musculoskeletal conditions like degenerative joint disease. Control these problems with appropriate management—such as increasing ventilation in the barn and increasing turnout time—and veterinary intervention in the form of medications and supplements.

Freeze/thaw cycles and muddy or wet conditions can lead to thrush in the hooves and “scratches,” or, pastern dermatitis, on the legs. Your best protection against these diseases is keeping the horse in as clean and dry surroundings as possible, picking his feet frequently, and keeping the lower limbs trimmed of hair. Another common winter skin condition is “rain rot,” caused by the organism Dermatophilus congolensis. Regular grooming and daily observation can usually prevent this problem, but consult your veterinarian if your horse’s back and rump develop painful, crusty lumps that turn into scabs.