How Stress Affects Your Horse’s Health

Stress is an often underestimated factor in equine health. While short-term stress can be part of normal life, ongoing or unmanaged stress can have a significant impact on a horse’s physical health, behaviour, and performance.

Understanding how stress affects horses can help owners recognise early signs and support their horse’s overall wellbeing.

What Causes Stress in Horses?

Horses are creatures of habit and thrive on routine. Common stressors include:

• Changes in turnout or stabling

• Travel and competition schedules

• Changes in herd dynamics

• Altered feeding routines

• Illness, pain, or discomfort

• Lack of forage or prolonged fasting

Even seemingly small changes can cause stress in some horses.

How Stress Affects the Body

Digestive Health

Stress is a major risk factor for Equine Gastric Ulcer Syndrome (EGUS).

Stress-related digestive signs may include:

• Weight loss

• Girthiness

• Reduced appetite

• Changes in droppings

Stress can disrupt normal gut function and increase stomach acid production.

Immune Function

Chronic stress can weaken the immune system, making horses more susceptible to:

• Infections

• Delayed wound healing

• Recurring health issues

Musculoskeletal Health

Stress can cause muscle tension and altered movement patterns, increasing the risk of:

• Back pain

• Muscle soreness

• Lameness

A stressed horse may move differently, placing strain on joints and muscles.

Behavioural Signs of Stress

Stress often presents as behaviour changes rather than obvious illness.

Common signs include:

• Irritability or aggression

• Girthiness or resistance to handling

• Reduced performance

• Stereotypical behaviours such as weaving or cribbing

• Lethargy or withdrawal

These behaviours should not be dismissed as “bad behaviour.”

Managing and Reducing Stress

Supporting your horse’s mental wellbeing is an important part of health management.

Helpful strategies include:

• Maintaining consistent routines

• Providing regular access to forage

• Minimising sudden management changes

• Allowing social contact where possible

• Gradual introduction to new environments or routines

Identifying and addressing sources of pain is also crucial.

When to Seek Veterinary Advice

You should contact your vet if:

• Behaviour changes persist

• Your horse shows signs of digestive discomfort

• Performance deteriorates without obvious cause

• Weight loss or recurrent issues develop

A veterinary assessment can help rule out underlying health problems and guide appropriate management.

In Summary

Stress affects far more than just behaviour, it can impact digestion, immunity, musculoskeletal health, and overall wellbeing. Recognising early signs and managing stress proactively can help keep your horse healthy and comfortable.

If you are concerned about stress-related changes in your horse, your vet can help assess underlying causes and advise on appropriate management.