There’s no single age when a horse suddenly becomes “senior.” Just like us humans, horses age at different rates depending on lifestyle, genetics, workload, and health history. As a guide, many horses are classed as senior from around 15 years old, but plenty remain active and youthful well into their twenties, while others may show age-related changes earlier.

Weight loss in older horses is often linked to dental changes and digestion, not calorie intake. Missing or worn molars make long fibre difficult to chew, which reduces nutrient breakdown and absorption. Poorly chewed forage can also upset hindgut balance and lead to loose droppings, weight loss, or discomfort. A dental check plus easier-to-chew fibre sources can make a huge difference.

For seniors who can’t manage long-stem hay, suitable hay replacers such as soaked meadow grass cobs orare ideal. Once soaked, they form a soft, “oesophagus-ready” mash that’s easier to chew and digest. Adding sainfoin pellets is also really helpful - they offer a great amino acid profile and natural bitters that support healthy digestion. Remember though - always introduce new fibre feeds gradually.

As a guideline, a senior horse on hay replacers may need up to 600g per 100kg bodyweight per day, split into several meals. As an example, a 500kg horse may require up to 3kg daily. Needs will vary based on condition, climate, workload, and overall health.

No! Liquid oils aren’t ideal for horses - the equine gut isn't evolved to digest oils other than the very small amount in grass forages - if you're adding extra liquid oil into the feed bowl it covers the forage fibre with oil and interfere's with nutrient absorption. 

Instead, choose ground oil seeds such as linseed, chia, hemp, or sunflower. They offer natural fatty acids, support skin and coat health, and integrate far better with a horse’s fibre-driven digestive system.

Winter increases a senior’s energy needs, so fibre-first feeding is key. Forage (or hay replacers when needed) fuels hindgut fermentation - the horse’s internal central-heating system. On very cold days, a small amount of oats or soaked barley can help, introduced slowly and only if appropriate for the horse’s metabolic status. Good rugging, shelter, and constant fresh water remain essential.

Many seniors benefit from targeted support because they may absorb fewer nutrients and experience age-related changes in joints, digestion, immunity, and organ function. 

Balanced minerals, amino acids, digestive support, and appropriate herbal blends can all help - but it’s never one-size-fits-all. 

Consider the whole picture (diet, teeth, workload, temperament, and health history) before choosing supplements.