A healthy digestive system is the foundation of every horse's wellbeing. From the foregut to the hindgut, the equine digestive tract is a delicate, complex environment that thrives on balance. When that balance is disrupted — through stress, travel, diet changes, or medication — horses can experience discomfort, reduced nutrient absorption, and behavioural changes.
For centuries, horse owners have turned to botanicals to support digestive function naturally. Modern equine herbalism blends traditional knowledge with an understanding of how specific plants interact with the equine gut. This guide explores the most effective herbs for digestive support, how they work, and how to use them safely.
The Equine Digestive System at a Glance
Horses are hindgut fermenters, meaning the bulk of fibre digestion and nutrient absorption happens in the caecum and large colon. This makes the hindgut microbiome — the community of beneficial bacteria — absolutely critical to health.
Disruptions such as high-grain diets, sudden pasture changes, antibiotics, or stress can alter the microbiome, leading to acidosis, discomfort, or loose droppings. Supporting the gut with the right botanicals can help restore and maintain that all-important balance.
Key Botanicals for Digestive Support
Peppermint
Mentha × piperita
Soothes the digestive tract and supports comfortable gut function.
Peppermint is one of the best-known digestive herbs for horses. Its natural volatile oils have a calming effect on smooth muscle, helping to ease mild spasms and support normal gut motility. Many horses find the taste highly palatable, making it an easy addition to daily feed.
Marshmallow Root
Althaea officinalis
Forms a protective mucilage layer along the gut lining.
Marshmallow root is rich in mucilage — a gel-like substance that coats and soothes mucous membranes. In the equine digestive tract, this can provide gentle protection for the stomach and intestinal lining, particularly useful during periods of dietary change or stress.
Chamomile
Matricaria chamomilla
Calms the nervous digestive system and supports relaxation.
Chamomile's gentle anti-spasmodic properties make it ideal for horses whose digestive upsets are linked to stress or anxiety. By supporting the gut-brain axis, chamomile helps settle both the mind and the stomach.
Fennel
Foeniculum vulgare
Supports healthy gas dispersal and appetite.
Fennel seeds have been used for generations to ease bloating and support comfortable digestion. Their aromatic oils encourage the production of digestive enzymes, helping the gut break down feed more efficiently.
Slippery Elm
Ulmus rubra
Traditionally used to soothe irritated digestive tissues.
Like marshmallow root, slippery elm contains mucilage that coats and calms irritated mucous membranes. It has a long history of use in both human and equine herbalism for supporting digestive comfort during times of disturbance.
Milk Thistle
Silybum marianum
Supports liver function, which underpins digestion and detoxification.
The liver plays a central role in processing nutrients, metabolising waste, and producing bile. Milk thistle's active compound, silymarin, has been widely researched for its hepatoprotective properties, making it a valuable addition for horses needing broad digestive and metabolic support.
Feeding Guidance
Botanicals can be fed dried, powdered, or as part of a blended supplement. When introducing any new herb, start with a small amount and build up gradually over 7–10 days. This allows the digestive system to adjust and reduces the risk of initial sensitivity.
- Introduce gradually: Begin with half the recommended serving for the first week.
- Feed consistently: Daily administration gives the best results; herbs work cumulatively.
- Check competition rules: If your horse competes under FEI or national rules, confirm that all ingredients are permitted.
- Consult your vet: Botanicals complement, not replace, veterinary care. Seek professional advice for persistent digestive issues.
When to Call the Vet
While botanicals are excellent for daily support and minor digestive disturbances, some symptoms require immediate veterinary attention. Contact your vet promptly if your horse shows any of the following:
- Persistent or severe colic pain
- Diarrhoea lasting more than 24 hours
- Significant loss of appetite or weight
- Blood in droppings or excessive saliva
- Signs of dehydration or lethargy
Ready to support your horse's digestive health?
Our botanical supplements are hand-finished in small UK batches, formulated with the same herbs discussed in this guide.