Prebiotics vs. Probiotics in Poultry. What’s the Difference and When Should You Use Each?
- 1 hour ago
- 5 min read
Gut health has become one of the most talked-about topics in poultry production, and for good reason. A healthy digestive system supports feed efficiency, immune function, livability and overall flock performance.
But with so many health additives on the market, producers often ask the same question: What’s the difference between prebiotics and probiotics, and when should I use them?
Pre and probiotics are often mentioned together, and while they share similar goals, they work in very different ways inside the bird. Understanding how each one functions, and how they can complement each other, can help you build a more precise and targeted health program for your flock.
What Is a Probiotic?
A probiotic is a living bacteria that provides a benefit to the bird.
In simple terms, probiotics introduce beneficial bacteria directly into the digestive system. Depending on the strain, these bacteria may support digestion, immune readiness and microbial balance by competing with less desirable bacteria for space and available nutrients.
One of the principles behind probiotics is competitive exclusion. When beneficial bacteria occupy the gut, they make it harder for harmful organisms to establish themselves and cause disease.
Researchers and field experience have shown probiotics can support performance in several ways, including:
Supporting gut balance during stress
Helping birds recover after antibiotic treatment or vaccine administration
Stabilizing bacterial populations during feed changes
Supporting early gut development in chicks
Producers often see the greatest benefit from probiotics during periods of disruption in the gastrointestinal tract when bacterial populations are shifting and birds are more vulnerable to performance losses. Probiotics used during these times can provide a stabilizing effect on the intestinal environment and decrease the risk of harmful bacteria taking over.
What Is a Prebiotic?
Instead of adding bacteria directly to the gut, a prebiotic feeds the beneficial bacteria that are already there. These specialized ingredients are not digested by the bird but are selectively used by beneficial microbes, helping them grow and multiply.
Think of it this way:
Probiotics add the good bacteria
Prebiotics feed the good bacteria
Prebiotics can also provide additional benefits beyond feeding and supporting the beneficial bacteria in your bird’s gut. Some types can bind harmful pathogens and stimulate immune function.
In practical terms, prebiotics often provide more stable, long-term support to the gut environment. Because they continue feeding beneficial bacteria throughout the digestive tract, their effects can last longer than a single probiotic application.
When to Use Prebiotics vs. Probiotics
Prebiotics and probiotics can both support gut health, but they’re not always used the same way. The biggest difference comes down to how quickly you need support and how long you want that support to last.
Probiotics are often used during short-term stress events when birds need beneficial bacteria added back into the gut quickly. This may include chick placement, feed changes, heat stress, transportation, medication withdrawal or recovery after a health challenge. During these times, the gut environment can shift fast, and probiotics can help reintroduce beneficial bacteria when birds are under pressure.
Prebiotics are typically used more consistently over time because they feed the beneficial bacteria already living in the gut. Instead of adding bacteria, prebiotics help support a stable gut environment day after day. This makes them a good fit for ongoing gut health programs, especially in pullets, breeders or flocks going through repeated stressors like vaccinations or long production cycles.
In simple terms, probiotics are best used as a targeted response tool, while prebiotics are often used as a long-term support tool. In some programs, they may be used together so birds receive beneficial bacteria and the food source those bacteria need to thrive.
Can You Use Prebiotics and Probiotics Together?
Yes, and in many situations, that combination makes sense.
When prebiotics and probiotics are used together, the pairing is called a synbiotic. The probiotic introduces beneficial bacteria, while the prebiotic provides the nutrients those bacteria need to survive and multiply.
This approach can be especially useful during recovery periods or ongoing stress conditions.
For example, producers may use both tools:
After vaccination
Following antibiotic treatment
During periods of environmental stress
When rebuilding gut health after a disease challenge
Using both together can help birds recover faster and maintain performance during transitions.
However, the decision should always come back to economics and management goals. As our poultry experts Dr. Tim Broderick and Alea Gigolitti on the Wing it Wisely podcast emphasized, the question isn’t just whether you can use both, it’s whether you should, based on the problem you’re trying to solve.
How to Choose the Right Tool for Your Flock
With so many products available, selecting the right solution can feel overwhelming. Labels often provide limited information, and not all products function the same way.
Instead of focusing only on ingredients, start by asking a few practical questions:
What challenge am I trying to solve?
When is that challenge happening?
How long do I need support?
Those answers will guide your decision.
Why Delivery and Consistency Matter
One of the most overlooked factors in gut health programs is product delivery. For probiotics to work, the bacteria must remain alive and reach the bird in sufficient numbers. Processing temperatures, storage conditions and water quality can all affect product performance.
Even when probiotics are delivered successfully, they typically remain active in the gut for a limited time. That means consistent application is necessary to maintain benefits.
Prebiotics, by contrast, tend to provide longer-lasting effects because they continue feeding beneficial bacteria throughout the digestive tract.
Understanding these differences can help producers set realistic expectations and build more effective programs.
Two Proven Synbiotic and Probiotic Tools for Poultry
Tools like Avi-Lyte and Avi-Bac help producers apply prebiotics and probiotics at the right time. Avi-Bac (a symbiotic) is commonly used early in life to establish beneficial bacteria and support ongoing gut development, while Avi-Lyte (probiotic plus vitamins – not a synbiotic) is often used during stress periods, such as heat stress, vaccination or feed changes, to help stabilize the gut and support recovery.
Using these tools strategically around key stress points can help birds stay more consistent, maintain performance and recover faster when challenges occur.
The bottom line, prebiotics and probiotics are both valuable tools, but they’re not interchangeable.
Each one plays a different role in supporting bird health, and the most effective programs use them strategically based on timing, stress level and production goals!
Want to go deeper on prebiotics and probiotics? Check out this Wing it Wisely podcast, where the Ralco poultry team break down how these tools work in the bird, when to use them and what they’re seeing in the field today.
Looking to strengthen your gut health program with targeted probiotic and synbiotic solutions? Call 1-800-533-5306 or email PoultryHelp@RalcoAgriculture.com to connect with our poultry team!
Avi-Bac - Superior Digestive Health From The Start
Avi-Bac is a natural water additive for day old or challenged birds that seeds the gut with beneficial bacteria and feeds those bacteria with an exclusive prebiotic fiber.
Avi-Lyte - When The Stress Is On
Avi-Lyte is a natural performance pack for poultry that hydrates and helps restore vital nutrients to ease transitions.