Feeding Senior Horses | Diet Changes That Help

Horses are living longer than ever. Better veterinary care and nutrition mean many stay active into their late twenties and even their thirties. As a horse ages, though, its body changes in ways that affect how it eats, chews and digests food. Feeding senior horses well means paying attention to these changes and adjusting the diet to suit each horse.

When Is a Horse Considered a Senior?

There is no single age at which a horse becomes a senior. Horses age at different rates depending on genetics, lifestyle, diet and exercise. One horse may show signs of ageing at 20, while another looks and behaves like a younger horse until 30.

A better guide is to combine the horse's age with the physical signs of ageing it shows. A 22-year-old gelding that holds his weight, chews his hay well and stays sound may not need any changes to his diet. A 19-year-old mare that drops weight every winter probably does.

Signs of Ageing to Watch For

Common signs include weight loss, a dipping topline, a dull coat, stiffness and difficulty chewing. Older horses may also have weaker immunity and a higher risk of colic, some eye conditions and infections. The risk of PPID (Cushing's disease) rises with age too.

How Ageing Changes a Horse's Digestion

The daily nutrient needs of a healthy older horse are much the same as those of an adult horse. The difference lies in how well the horse can chew and use its food.

Teeth That Wear Out

Horses have hypsodont teeth, which keep erupting from the gum throughout life. Chewing slowly grinds them down, so the older the horse, the less tooth it has left. In time, teeth can become smooth, short and loose, and some fall out. This is the main reason older horses lose condition. A horse that can no longer grind its hay properly simply cannot get enough energy or fibre from it.

A Less Efficient Hindgut

The microbes in the hindgut that break down fibre become less efficient with age. This means an older horse gets fewer nutrients from the same amount of forage. The small intestine also loses some function, which makes protein harder to digest.

Muscle Loss

Older horses naturally lose muscle, a process called sarcopenia. You may notice your veteran struggles to keep muscle along the topline, even with regular work. Horses with PPID often lose muscle faster than other older horses.

Start With Dental Care

Before changing anything in the diet, check your horse's teeth. Horses only get one set of permanent teeth, so routine dental care is vital. Older horses should see a vet or qualified equine dentist every six months.

Signs of a Dental Problem

Watch for quidding, where the horse drops balls of half-chewed forage. Dropping feed, frequent choke and weight loss are other warning signs. Large strands of fibre in the droppings can also point to poor chewing or digestion.

Weight loss does not always come from the teeth, however. If your horse is losing condition, ask your vet for a full check-up, including bloodwork, to rule out other health problems. Don't simply put it down to old age.

Forage Comes First

Forage is the foundation of every horse's diet, and it becomes even more important for seniors. For retired horses out of work, forage can make up over 90% of the diet. Fibre supports digestive health, keeps the horse busy and helps it stay warm in winter.

How Much Forage to Feed

Every horse should eat at least 1.5% of its body weight in forage each day. For a 500 kg horse, that means at least 7.5 kg of forage daily. Many older horses do well on grass in summer but lose weight over winter when grazing is scarce, so keep a close eye on intake during the colder months.

Choosing the Right Hay

Mature, stemmy hay is hard to chew and harder to digest. Leafy, early-cut hay is softer and contains more nutrients, which makes it a better choice for older horses. For example, a horse that leaves thick stalks behind in its hay net may do far better on a softer, leafier cut.

Forage Alternatives for Poor Teeth

If your horse struggles to chew long forage, replace some or all of it with an easier option. Otherwise, the horse will keep losing condition, however much hay you offer. Horses with fairly good teeth can manage short-chopped fibre such as chaff. Check the label, as some chaffs contain added molasses.

As chewing gets harder, move gradually to soakable fibre feeds. Soaked hay cubes, high-fibre nuts, unmolassed beet pulp and specialist senior mashes need very little chewing. A horse with only a few teeth left might eat soaked hay cubes as its main source of roughage.

Choosing a Concentrate

Once forage needs are met, you can decide whether your horse needs a concentrate. Match the feed to your horse's energy needs, whether that is simple maintenance or extra fuel for light work.

Pick Gut-Friendly Energy Sources

Feeds high in cereal grain are not ideal for many older horses, especially those with digestive problems. Feeds high in fat and fibre are gentler on the gut and provide calm energy. Look for well-processed feeds, such as pelleted or extruded options, which are easier to digest. Horses without molars struggle with hard ingredients like whole maize and sunflower seeds, so avoid these.

Be careful with conditioning feeds. Many are high in starch and low in fibre, which can upset digestion without adding condition. A small amount on top of chewable fibre is fine, but never use a conditioning feed to replace forage.

Protein Quality Over Quantity

Adding more protein will not rebuild a senior's topline on its own. The quality of the protein matters more than the amount. Feeds rich in essential amino acids such as lysine, threonine and methionine support muscle far better than feeds that are simply high in protein. Pair good-quality protein with gentle exercise, because muscle cannot be built through feed alone.

Feeding Horses With PPID or Laminitis

If your horse has PPID, laminitis or a history of tying-up, choose feeds low in starch and sugar, with a total NSC (non-structural carbohydrate) level under 15%. A feed labelled "no sugar" may still be high in starch. For example, a feed with 0% sugar and 18% starch has an NSC of about 18%, which is too high. A feed with 4% sugar and 10% starch has an NSC of about 14%, which is suitable. Remember that hay makes up most of the diet, so it needs to be low in NSC too.

Vitamins and Minerals

Your senior needs a balanced intake of vitamins, minerals and trace elements. If you feed a commercial senior feed at the recommended amount, your horse is likely getting enough. Horses on straight grains or on forage alone will usually need a vitamin and mineral supplement or a balancer.

Avoid Oversupplementing

It is possible to give too much of some nutrients. Check what your feeds and forage already provide before adding supplements. For example, if your senior feed is fully fortified, adding a separate mineral lick may double up on certain minerals. Talk to your vet or an equine nutritionist if you are unsure.

Water and Hydration

Water is the most important nutrient for any horse. Older horses dehydrate more easily than younger ones, and in winter they may drink less, which raises the risk of impaction colic. Always provide clean, fresh water. Keeping water at a moderate temperature, roughly 7°C to 18°C, encourages horses to drink more.

Adding water to feed helps too. A warm mash on a cold winter evening is appealing and adds extra fluid to the diet.

Managing Weight in Older Horses

Weigh-tape and condition-score your senior every week. Use your hands, not just your eyes, as a winter coat can hide weight loss. Older horses can drop condition very quickly.

The Thin Senior

For a senior that is losing weight, first make sure it has plenty of forage it can actually chew. More time on good pasture helps, as fresh grass contains more energy and protein than dried forage. Highly digestible fibre sources such as beet pulp and soya hulls, along with added fat, can supply extra calories.

The Overweight Senior

Not every older horse struggles to hold weight. Some become overweight when their workload drops. If you need to cut back feed, make sure the horse still gets all its essential vitamins and minerals. A balancer is a good option, as it provides nutrients in a small, low-calorie ration.

Practical Feeding Management

Feed Little and Often

Feed small meals at least three times a day. This keeps your horse interested in its food and supports better digestion.

Change Feeds Gradually

Sudden changes can upset the hindgut microbes and cause digestive problems. Replace 20% to 25% of the old feed with the new feed every other day, so the full change takes a week or more.

Soak Feeds and Hay Correctly

If your horse bolts its feed without chewing, moisten it slightly to help prevent choke. Aim for softened feed, not soup. Soaking hay lowers its sugar, but by how much varies widely from hay to hay, so no fixed soak time makes it safe. When UK hays were soaked for up to 16 hours, they lost an average of 27% of their water-soluble carbohydrate (range 6% to 54%), and seven were still above the 100 g/kg dry matter ceiling suggested for laminitic animals afterwards (Longland and colleagues, 2011). If your horse is prone to laminitis, have the forage analysed rather than relying on a soaking time. Soak only enough for one meal, as stored soaked hay can grow mould and bacteria. Throw the soaking water away where your horses cannot reach it.

Separate Seniors at Feeding Time

Older horses often slip down the pecking order and get pushed off their feed by younger herd mates. Feed your senior in a separate area so it can eat slowly and finish its full ration. Keeping feed and water close together also helps older horses with limited mobility.

Keep Them Moving

Gentle, regular exercise helps maintain muscle, mobility and condition. Even daily turnout or light hacking makes a difference for many older horses.

Final Thoughts on Feeding Senior Horses

Feeding senior horses well comes down to treating each horse as an individual. Start with the teeth and put forage first. Choose gut-friendly feeds and watch your horse's condition closely so you can adjust the diet quickly. If you are unsure about the right diet for your older horse, a qualified equine nutritionist or your vet can help you build a feeding plan that keeps your horse healthy for years to come.

Frequently Asked Questions