Weaning piglets without any problems

09 September 2021

6 minutes

The piglet weaning period implies a change in environment and nutrition, and results in reduced intestinal function. This article describes the potential negative implications and what can be done about them through means of nutrition.

Why weaning challenges the gut

The intestine has two primary functions. First, it digests and absorbs nutrients that support growth and development. Second, it acts as a barrier that helps prevent harmful pathogens from entering the body. Around weaning, both functions are put under pressure.

During lactation, piglets consume highly digestible sow's milk. After weaning, feed intake often drops considerably at exactly the moment when piglets need to adapt to solid feed.

This reduction in feed intake affects the intestinal villi, the finger-like structures responsible for nutrient absorption. When piglets eat too little during the first days after weaning, the villi shrink rapidly, reducing the intestine's ability to absorb nutrients and water efficiently.

As a result:

Nutrient absorption becomes less efficient.
Growth performance may decline.
More undigested nutrients reach the large intestine.
The risk of digestive disturbances increases.

Low Feed Intake Creates Additional Risks

The consequences of low feed intake go beyond reduced growth.

When nutrient absorption decreases, more undigested nutrients become available for undesirable bacteria in the gut. This can increase the risk of digestive problems not only immediately after weaning but also later in the growing period.

Research has also shown that low feed intake can affect gut integrity. During the first days after weaning, the connections between intestinal cells can become less effective, increasing intestinal permeability, often referred to as "leaky gut".

This allows unwanted pathogens and toxins to pass more easily through the intestinal barrier, placing additional pressure on the piglet's immune system.

Stress, environmental challenges and infections can further increase this risk.

Not Every Piglet Responds the Same

One of the biggest challenges after weaning is the variation in feed intake between piglets.

In practice, some piglets adapt quickly and start eating immediately. Others may consume very little feed during the first two to three days after weaning.

These slow starters are often the animals most at risk of:

Intestinal damage
Reduced growth performance
Digestive disorders
Increased health challenges later in life

This is why successful weaning programmes focus not only on average feed intake but on ensuring that every piglet begins eating as early as possible.

The First Three Days Are Critical

The period immediately after weaning largely determines how successfully piglets adapt to their new environment and feeding regime.

Young piglets weaned at three to four weeks of age typically have limited experience consuming dry feed. As a result, they often experience a temporary reduction in feed intake after weaning.

To maintain gut function and support adaptation, the focus during the first three days should be on maximising energy intake through highly digestible feed sources.

The easier nutrients are to digest and absorb, the better the piglet can maintain intestinal development and minimise damage to the gut lining.

An Effective Feeding Strategy After Weaning

A practical post-weaning feeding strategy consists of two phases:

Phase 1: Stimulate Feed Intake

During the first three days after weaning, piglets benefit from a highly digestible, energy-rich prestarter designed to encourage feed consumption and support gut function.

The objective is simple:

Encourage every piglet to eat.
Maintain intestinal villi development.
Support gut integrity.
Reduce the post-weaning growth check.

Phase 2: Support Recovery and Development

After the initial transition period, piglets can be moved onto a high-quality weaning feed.

This diet should support:

Repair of any intestinal damage
Stable digestive function
Continued feed intake
A smooth transition towards the next feeding phase

By creating a gradual nutritional transition, piglets are better prepared for future growth and performance.

Gut Health Starts Before Problems Appear

Successful weaning is not achieved by solving problems after they occur. It starts by preventing feed intake dips and supporting gut health from day one.

Key focus points include:

✔ Encouraging early feed intake

✔ Providing highly digestible nutrients

✔ Supporting intestinal development

✔ Maintaining gut barrier function

✔ Creating a gradual transition between diets

✔ Monitoring variation between piglets

When these factors are managed successfully, piglets are better equipped to maintain health, growth and feed efficiency throughout the production cycle.

Building Stronger Piglets Through Nutrition

At Swinco, we believe piglet performance starts with a healthy gut. By combining practical farm observations, nutritional expertise and feeding programmes focused on intestinal development, producers can reduce weaning-related challenges and create the foundation for long-term performance.

A successful weaning strategy is not simply about changing feed. It is about helping piglets transition from milk to solid feed while protecting gut health at every step.

Would you like to optimise your weaning programme? Contact the Swinco team for practical advice and feeding solutions tailored to your production system.