Senior Horse Care: Diet, Exercise and Health After 20

Reviewed by Dr. Ali Ehtisham, DVM

Advances in equine veterinary care, nutrition, and management mean horses are living well into their 20s and 30s in numbers unprecedented in the history of horse keeping. Horses over 20 are no longer unusual — they are a significant and growing part of the equine population. But senior horses need a genuinely different approach to care than younger horses: different nutritional strategies, modified exercise programmes, proactive health monitoring, and a willingness to adapt as the horse's needs change. Here is what changes and what stays the same.

When Is a Horse Considered Senior?

There is no single universally agreed threshold, but the equine veterinary community generally considers horses "senior" from approximately 15–18 years, and "geriatric" from around 20 years. These are rough guidelines rather than precise biological markers — individual variation is enormous, and breed, previous management, workload history, and health all influence how a horse ages.

Native breeds and ponies — Shetlands, Welsh, Fell, Highland, and similar types — frequently live into their mid-to-late 30s and can remain well and active well past 25. Warmbloods and heavier breeds often show more pronounced ageing changes earlier, with many showing significant musculoskeletal changes by their late teens. Thoroughbreds vary considerably — some retain excellent physical condition well into their 20s while others show early ageing. Draft breeds tend to have shorter lifespans than lighter breeds. The takeaway is that calendar age is a guide, not a determinant — judge the individual horse, not the number.

Physical Changes to Expect

Muscle wasting along the topline. Loss of muscle mass — particularly the epaxial muscles along the neck, back, and hindquarters — is one of the most visible signs of ageing in horses. The topline becomes less defined, the spine more prominent, and the quarters flatter. This muscle loss reflects changes in protein synthesis efficiency, reduced growth hormone activity, and often reduced workload. Appropriate exercise and a protein-adequate diet can slow but not completely prevent this process.

Swayback and sunken temples. Increased curvature of the back — lordosis or swayback — and hollowing of the temples (the temporal fossa depressions above the eyes) are characteristic of advancing age in horses. Temple hollowing is a useful early indicator of overall body condition changes in older horses, particularly significant when it appears suddenly or in a horse that appears otherwise well.

Coat changes indicating PPID. A long, curly, or shaggy coat that fails to shed properly in spring and summer — particularly when the horse previously had a normal coat — is the most recognisable sign of Pituitary Pars Intermedia Dysfunction (PPID), also known as equine Cushing's disease. This condition affects an estimated 20–25% of horses over 15 and requires veterinary diagnosis and treatment. Not all long-coated horses have PPID, but any coat that is significantly abnormal in length or texture warrants an ACTH blood test.

Dental changes and difficulty chewing. Horse teeth erupt gradually throughout life, with the crown emerging as the tooth wears down. By their late teens and twenties, many horses are running out of tooth — the crown becomes very short and eventually the tooth is lost. Changes in dentition create difficulty effectively chewing long-stem forage: the horse may quid (drop half-chewed balls of hay from the mouth), lose condition despite apparently eating well, or develop choke from inadequately chewed food. Six-monthly dental checks are essential for senior horses.

Reduced immune function. Ageing is associated with immunosenescence — progressive decline in immune system efficiency. Senior horses may be more susceptible to infections, less responsive to vaccinations, and slower to recover from illness or injury. Maintaining up-to-date vaccination programmes and vigilant health monitoring becomes more important, not less, as horses age.

Joint stiffness. Degenerative joint disease (osteoarthritis) is extremely common in senior horses, particularly in the lower limb joints, hocks, and stifles. Stiffness is most apparent after rest — the horse may take several minutes to work through stiffness at the beginning of exercise. Cold, damp weather typically worsens clinical signs. Appropriate exercise, joint supplements, and where needed anti-inflammatory medication under veterinary guidance can significantly improve quality of life.

Feeding the Senior Horse

Forage first — but adapted for dental limitations. Forage should remain the foundation of the senior horse's diet, but its form may need to change. A horse with excellent dentition can continue to eat good-quality hay. A horse with poor dentition may need soaked hay (softened in water for 30 minutes), haylage (naturally more pliable), hay cubes or compressed forage soaked until soft, or in severe cases, a complete forage replacer that requires no chewing at all. Providing adequate fibre intake is essential for gut motility, temperature maintenance, and preventing gastric ulcers.

Senior complete feeds. Specially formulated senior feeds are designed with higher digestible energy, elevated quality protein (including essential amino acids like lysine and methionine that support muscle mass), elevated bioavailable vitamins and minerals, and a fibre content that can partially substitute for forage in horses with dental limitations. They often include joint-supporting nutrients (glucosamine, MSM, omega-3s) and are typically low in starch and sugar — important for the metabolic health of older horses.

Soaked sugar beet pulp. Sugar beet pulp (always unmolassed and fully soaked — minimum 24 hours in cold water to avoid choke risk) is an excellent calorie-dense, high-fibre, easily digestible feed for senior horses needing additional condition. It has a low starch content, is highly digestible, and provides fermentable fibre that supports hindgut health. It can be mixed with other feeds and is extremely palatable.

Increased feeding frequency. Dividing the daily ration into 3–4 smaller meals rather than 2 larger ones improves digestibility, supports stable blood glucose and insulin levels, reduces gastric acid accumulation (important in a horse with reduced forage intake), and ensures a continuous supply of hindgut fermentation substrate. Senior horses benefit particularly from this approach because their digestive efficiency is reduced compared to younger horses.

Water access in winter. Senior horses are at elevated risk of impaction colic in winter because cold water reduces voluntary water intake. Providing lukewarm water, heated water troughs, or wet feeds increases water consumption and reduces impaction risk. Monitoring water intake during cold weather is important for any horse but particularly for senior horses and those with dental limitations who may be eating more wet feed than long-stem hay.

Common Health Conditions in Older Horses

PPID (Cushing's disease). As noted above, PPID affects up to a quarter of horses over 15. Signs include abnormal coat retention, pot belly, muscle wasting, increased water intake and urination, laminitis, and reduced immunity. Diagnosis by ACTH blood test, followed by Pergolide treatment under veterinary supervision, is highly effective at managing the condition and reducing associated complications including laminitis risk.

Equine metabolic syndrome. EMS is characterised by obesity, regional fat deposition (particularly a hard, cresty neck), and insulin dysregulation. It is distinct from PPID but both conditions can be present simultaneously. Management centres on weight reduction, strict dietary carbohydrate restriction, and controlled exercise.

Arthritis and joint disease. Degenerative joint disease is nearly universal in senior horses to some degree. Management includes appropriate regular exercise to maintain joint fluid circulation and muscle support, joint supplements (evidence is variable but some horses respond well to glucosamine, chondroitin, and omega-3 supplementation), appropriate farriery to maintain correct limb alignment, and veterinary pain management when needed.

Dental disease and choke risk. Progressive dental wear, wave mouth, smooth mouth, and tooth loss create chewing inefficiency and choke risk. Six-monthly dental examinations by a qualified equine dental technician or vet are the standard recommendation for horses over 15. Soaking all feeds for horses with significant dental disease is essential for preventing choke.

Visual decline. Senile cataracts and other age-related visual changes are common in horses over 20. A horse with reduced vision may be more reactive to sudden movement or unfamiliar environments, and management should account for their altered visual capacity.

Exercise for Senior Horses

Gentle, regular exercise is significantly better for arthritic senior horses than extended rest. Movement maintains joint fluid circulation, preserves muscle mass that supports joint stability, maintains cardiovascular fitness, and supports mental wellbeing. A senior horse that stands still in a stable for most of the day is not being rested — it is losing condition and joint health.

The exercise programme should be adapted to the individual horse's current ability. A thorough warm-up (15–20 minutes of slow work allowing joints to loosen) and cool-down period are more important in senior horses than in younger ones. Work that is appropriate for a fit 10-year-old may be excessive for the same horse at 22 — reduce intensity and duration as needed, guided by how the horse moves and recovers.

Daily turnout — even for retired horses — is one of the most important health management tools available. A horse moving freely in a paddock for several hours daily has better joint health, better gut motility, and better mental wellbeing than one confined to a stable. If full turnout is not possible due to laminitis risk, a small pen or dry lot with appropriate feeding is better than stable confinement.

Veterinary Care for Senior Horses

Twice-yearly veterinary health checks are the minimum recommendation for horses over 20. These should include body condition scoring, dental assessment (or separate dental referral), discussion of current management and feeding, assessment of joint health and movement quality, and blood testing where indicated. Annual ACTH testing in autumn for all horses over 15 is a standard component of proactive senior horse health care.

Vaccination programmes should be maintained throughout the senior years despite reduced immune response efficiency — senior horses are if anything more vulnerable to infectious diseases than younger horses. Discuss with your vet whether modified vaccination protocols (more frequent boosters) are appropriate for your senior horse's specific circumstances. Regular faecal worm egg counts rather than calendar-based worming allows targeted treatment that reduces resistance development and avoids unnecessary chemical load.

Quality of Life and End of Life

Monitoring a senior horse's quality of life requires regular honest assessment. Good indicators include: maintenance of body condition despite appropriate feeding, engagement with the environment and other horses, willingness to move when encouraged, absence of visible pain behaviours, normal eating and drinking, and general alertness. Concerning indicators include progressive weight loss despite optimal feeding, constant pain behaviours (reduced movement, abnormal posture, reluctance to be touched), loss of interest in surroundings or companions, inability to maintain hydration, and repeated laminitis or other serious health crises.

The end-of-life conversation with your veterinarian is best had before it is urgently needed. Understanding the criteria for humane euthanasia in advance, and having a vet relationship where this can be discussed openly, makes the most difficult decision in horse ownership somewhat less overwhelming when the time arrives. Euthanasia on welfare grounds is an act of care and responsibility — the final kindness we can offer a horse whose quality of life can no longer be maintained.

Frequently Asked Questions

Can a 25-year-old horse still be ridden?

Yes, if the horse is healthy, comfortable, and the work is appropriate to their current capability. Age alone is not the criterion — soundness, enthusiasm, and comfort level are. Regular veterinary assessment guides appropriate workload.

What is the best feed for a senior horse that is losing weight?

First investigate the cause — dental disease, PPID, and parasitism are common culprits. Then provide high-calorie, easily digestible feeds: soaked hay, soaked sugar beet pulp, senior complete feeds, and additional oil for calories. Multiple small meals improve utilisation.

How do I know if my old horse has Cushing's disease?

The most visible signs are a long curly coat that doesn't shed, pot belly, topline muscle loss, and recurrent laminitis. Confirm with an ACTH blood test, ideally in autumn. Annual testing is recommended for all horses over 15.

Should senior horses be rugged more?

Generally yes — senior horses thermoregulate less efficiently and PPID horses have poor coat insulation. Match rugging to conditions and body condition rather than age alone, and check regularly under the rug.

When is it time to retire a horse from work?

When they cannot perform their current job without pain or significant welfare compromise. Age alone is not the criterion — guide the decision by the horse's soundness, comfort, and apparent enjoyment of work.

For a full guide to horse health and nutrition, visit the horse care hub. For guidance on common conditions in older horses, see our horse health resources.

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Disclaimer: This article is for educational purposes only and does not constitute veterinary advice. Always consult a qualified equine veterinarian for individual health and management guidance for your senior horse.