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Ask the Veterinarian: Older Horse Care



By Hannah Weimer

Question: I have an 18-year-old gelding that has generally been an easy keeper, but just recently began losing weight. With winter approaching, I really want to do all I can do to help him. What are your recommendations?

Answer: A question like this is always hard to answer since there are a variety of reasons an older horse, or any horse for that matter, may begin to lose weight. My first recommendation with cases like these is to have a veterinarian sedate the horse and perform a complete dental exam. Even if you haven’t noticed the common signs, such as difficulty chewing, dropping grain, or head tossing, dental problems always top the list for why a horse could be losing condition. Unlike humans, horses have hypsodont teeth which have long, well developed roots that continually erupt over time. This growth is offset by the grinding that occurs when a horse chews, so that the portion of the tooth you see above the gum line stays the same height. Problems occur due to size difference between the upper and lower arcades, the upper being slightly wider which allows sharp points to form on the cheek side of the upper teeth and the tongue side of the lower teeth. These sharp points, over time, can wear on the cheeks and tongue causing ulcerations to form. Larger points called hooks (upper) or ramps (lower) can also form off the front of the first premolars and back of the last molars causing discomfort as the horse chews. These problems can generally be controlled with a dental exam and float once a year.

A problem more commonly seen in the mouths of older horses is “wave mouth.” This occurs as one tooth is either lost or fractured, or even just worn down, allowing the opposite tooth to become longer since it is no longer being ground down by the shortened tooth. This causes the whole occlusal surface to take on a wave, or S shape, which decreases the effectiveness of the horse’s chewing motion and limits utilization of feed. This problem is more difficult to correct and may need to be addressed with a dental float every six months.

Parasites are another common reason for a horse to lose weight. While it was previously recommended to deworm your horse several times a year with rotating deworming agents, the AAEP has changed its stance in the last few years and now recommends that a fecal egg count be performed on each horse yearly and an individualized deworming program be created, based on the type and amount of parasite eggs that are seen in the manure sample. The benefits to this method are two-fold as it provides a more efficient system targeting the parasites that the horse is shown to have, as well as, in many cases, saving the owner money as horses that are low shedders can be dewormed less often than the previous system recommended. This system is also a way to decrease the resistance that we have seen building in equine parasites from the previous overuse of deworming agents. Management strategies such as not feeding hay on the ground, cleaning turnout pens regularly, and limiting the number of horses per pasture to prevent overgrazing can also help decrease your horse’s exposure to parasites.

 If you’ve addressed all of the issues above and they haven’t resolved your weight loss issues, I would recommend having your veterinarian look further with a full physical exam, complete with bloodwork. This bloodwork can help determine if you horse has an underlying infection or anemic condition, as well as checking liver, kidney, and muscle function. This is also a good time for your veterinarian to examine what you are feeding your horse and make nutritional recommendations. A fat supplement may be suggested to add more easily digestible calories to the diet, or a complete feed may be needed depending on the status of your horse’s teeth and their ability to properly chew and digest roughage. Hay quality should also be evaluated to be sure that you are providing the most nutritious feed possible for your senior horse.

Because our equine companions are reaching increasing ages, thanks to the improvements in general management and veterinary care that have occurred over the years, many veterinarians are offering senior wellness packages to their clients in an effort to offset some of the costs accrued with the proper management of older horses. Full Circle Equine currently offers a Senior Wellness Program which includes biannual physical exams and dental care, vaccines, Coggins tests, and annual blood work at a 20% discount.

Fall is a great time to get older horses prepped for the winter months. With your veterinarian, develop a good nutrition plan, have a dental exam performed, and make sure the horses are up to date on their vaccines and have been dewormed. Remember, older equines are even more susceptible to disease and parasites, so it’s extremely important to vaccinate and have a deworming program in place. Winter is tough on our senior friends, but with the proper veterinary care, husbandry, and nutrition, they can stay fuzzy and happy until springtime!

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