Moisture Optimization and Mold Control:
An Integrated Approach to Improving Feed Quality,
Shelf Life, and Feed Mill Profitability in Tropical Climates

Dr. Maloshrie Bora, Senior Program Manager – Feed Safety, Trouw Nutrition South Asia

Across India and South Asia, feed manufacturers today face a common challenge: producing safe, stable, high-quality feed while navigating increasingly variable climate conditions, fluctuating raw material quality, rising production costs, and greater demands for feed efficiency.

Among the many factors that influence feed quality, moisture management remains one of the most underestimated. Yet moisture directly impacts pellet quality, nutrient preservation, feed hygiene, shelf life, production throughput, and overall profitability. Improper moisture management can result in shrinkage, spoilage, mold proliferation, nutrient losses, increased fines, and reduced mill efficiency. Conversely, optimized moisture control can generate significant economic returns while improving feed quality throughout the supply chain.

The Hidden Economics of Moisture Loss
During feed manufacturing, moisture is lost at several stages, including grinding, conditioning, pelleting, cooling, storage, and transportation. Industry observations indicate that feed mills can lose between 0.5% and 1.5% moisture during production, resulting in direct shrinkage and reduced profitability. A feed mill producing 500 tonnes per day can lose approximately 5 tonnes of saleable product for every 1% moisture reduction. In an industry where margins are constantly under pressure, minimizing process losses represents a substantial opportunity for value creation.

Why Adding Water Alone Does Not Solve the Problem
A common industry practice for compensating moisture losses is the addition of water during feed processing. While this may appear straightforward, water possesses high surface tension and does not distribute uniformly throughout the feed matrix. Instead, free moisture often remains on the surface of feed particles, increasing water activity and creating favourable conditions for microbial growth. The challenge for the modern feed industry is therefore not simply increasing moisture content, but ensuring moisture is effectively distributed and retained throughout the feed while maintaining microbial stability.

Mold Growth: A Feed Quality and Profitability Threat
Molds are among the most significant biological threats to feed quality. Beyond visible spoilage, molds consume valuable nutrients, reduce energy content, affect feed palatability, shorten storage life, and create conditions favourable for mycotoxin production. The economic implications can be significant. Raw materials often constitute up to 80% of total feed production costs. Any reduction in nutritional value, shelf life, or feed volume directly impacts both manufacturers and producers downstream.

Emerging Scientific Approaches to Mold Inhibition
Advances in feed preservation technology have moved beyond conventional organic acid applications. Modern solutions increasingly combine multiple modes of action to optimize efficacy under practical feed manufacturing conditions. These technologies typically integrate:
Organic acids
– Buffered acid systems
– Moisture management agents
– Surfactants and emulsifiers
– Synergistic bioactive compounds
Such approaches improve moisture distribution, enhance contact between active ingredients and microbial cells, and prolong preservation effectiveness throughout storage. This scientific evolution reflects the industry’s transition from simple preservation strategies toward integrated moisture and microbial management systems.

Commercial Validation: Integrating Moisture and Feed Hygiene
Research and commercial evaluations have demonstrated that moisture management and mold control must work together. In one reported study, the addition of plain water alone reduced feed shelf life by approximately 33%. However, when moisture was combined with an integrated mold inhibition program, shelf life improved compared to untreated feed while preserving feed quality and stability. Additional commercial applications have shown benefits including:
– Improved feed mill throughput
– Enhanced pellet durability
– Reduced reprocessed fines
– Better moisture retention
– Improved production efficiency
– Greater feed stability during storage
These findings highlight that effective moisture optimization depends on simultaneously managing microbial risks

A Modern Approach for South Asia
Recognizing the unique challenges faced by feed manufacturers in tropical climates, Trouw Nutrition has developed integrated solutions specifically designed to optimize moisture management and feed hygiene.

Among these solutions is the Fylax® portfolio, which combines organic acid technology, moisture management agents, surfactants, and the proprietary ActiProp® technology platform. The objective is to improve moisture distribution, enhance mold inhibition, preserve nutrient value, and support feed mill efficiency within a single integrated program. ActiProp® technology works by increasing mold cell wall permeability and improving access of active ingredients to microbial targets, resulting in enhanced preservation performance compared with conventional approaches. At the same time, moisture-management components facilitate more uniform distribution of moisture within the feed matrix, helping improve operational efficiency and shelf-life outcomes.

In today’s feed industry, moisture management can no longer be viewed simply as a processing parameter—it is a critical driver of feed quality, feed safety, and profitability. As feed manufacturers across India and South Asia face increasing challenges from humidity, raw material variability, and shelf-life pressures, an integrated approach that combines moisture optimization with effective mold control is becoming essential. By preserving nutrient value, reducing shrinkage, improving pellet quality, and enhancing microbial stability, modern feed hygiene solutions can help mills achieve greater operational efficiency while delivering safer, more consistent feed to livestock producers. Ultimately, successful feed preservation is not just about preventing spoilage—it is about maximizing value throughout the feed-to-food chain.

Introduction : Every year, invisible contaminants hidden within grains and feed ingredients silently reduce livestock productivity. Mycotoxins—naturally occurring toxic compounds produced by fungi—are responsible for millions of dollars in economic losses through poor growth, reduced immunity, reproductive disorders, lower feed efficiency, and increased mortality. Although impossible to see with the naked eye, their impact on poultry, swine, and dairy production is enormous.

What Are Mycotoxins?
Mycotoxins are toxic secondary metabolites produced by moulds such as Aspergillus, Fusarium, and Penicillium. Scientists have identified over 300 different mycotoxins, and studies indicate that nearly one-quarter of global feed supplies may be contaminated.
The most economically important toxins include:
-Aflatoxins
– Ochratoxins
– Fumonisins
– Deoxynivalenol (DON)
– T-2 Toxin
– Zearalenone
Each affects animals differently, but all reduce productivity and profitability.

Why Do Mycotoxins Develop?
Moulds flourish when four conditions come together:
– Warm temperatures
– High humidity
– Moisture in grains
– Oxygen
Once established, fungal growth continues during harvesting, storage, transportation, and feed manufacturing unless properly controlled.

India’s Mycotoxin Challenge
Recent testing presented in the report paints a worrying picture. 6,304 feed analysis, 99% contamination, and 83% above the performance-risk threshold.
Key Findings

– 6,304 feed analysis conducted
– 99% showed detectable contamination
– 83% exceeded performance-risk thresholds
Among ingredients, DORB, peanut meal, maize, soybean meal, DDGS, and corn gluten all showed significant contamination levels.

Multiple Mycotoxins: A Greater Threat
Animals are rarely exposed to a single toxin.
Instead, feeds commonly contain multiple mycotoxins that interact synergistically, making the combined damage significantly greater than the effect of individual toxins. This explains why even relatively low toxin concentrations can cause substantial production losses.

Economic Impact on Farms
The consequences are visible across every production system.

Poultry
– Lower feed intake
– Reduced weight gain
– Poor feed conversion
– Thin eggshells
– Lower hatchability
– Fatty liver
– Weak immunity

Swine
– Reproductive disorders
– Embryonic mortality
– Vomiting
– Reduced growth
– Feed refusal
– Tail necrosis
– Liver and kidney damage
Ultimately, these problems translate directly into economic losses through poorer animal performance.

The Hidden Cost: Immune Suppression
– One of the most damaging effects of mycotoxins is their ability to suppress the immune system.
– Animals become more vulnerable to bacterial and viral infections while showing reduced responses to vaccines and treatments.
– This means disease outbreaks become more severe and recovery becomes slower.

Can Nutrition Help?
Nutritional interventions can reduce the impact of toxins.

Recommended approaches include:
– Higher amino acid supplementation
– Vitamins E, C, and D3
– Selenium
– Choline chloride
– Liver-support products
– Mold inhibitors
– Broad-spectrum toxin binders
These measures improve resilience while reducing toxin damage.

Scientific Toxin Elimination Management (STEM-500)
An effective strategy combines four complementary actions:
1. Prevention
Prevent fungal growth before toxins develop.
2. Elimination
Bind multiple mycotoxins irreversibly.
3. Neutralization
Use enzymatic systems to neutralize toxins.
4. Gut Ecology Enhancement
Improve gut health while strengthening immunity and reducing pathogen pressure. This integrated approach offers broader protection than relying on toxin binders alone.

Featured Solution: STEM-500
The presentation introduces STEM-500, a multi-component toxin management product formulated with:
– Specially treated HSCAS
– Organic acids
– Oxine Copper
– MOS
– Bio-active phytocompounds
– Polyphenols
– Lactobacillus
– Lipotropic agents
According to the presentation, the product is designed to reduce mould growth, bind multiple mycotoxins, minimize endotoxin effects, improve liver function, support gut health, and enhance feed conversion, growth, and survival.

Conclusion
Mycotoxins remain one of the most significant hidden threats in modern animal production. Since contamination can occur throughout the grain supply chain, prevention alone is rarely sufficient. A comprehensive management strategy—combining mould control, toxin binding, detoxification, and gut health support—is essential for maintaining animal health and maximizing production efficiency.

It was a pleasure to visit the Gurgaon office of Dovoy Chemicals India Pvt. Ltd., a biotechnology-driven company that has been delivering innovative solutions to industries worldwide. With a strong presence across Asia, Africa, and the Middle East, Dovoy has established itself as a trusted partner in animal health, nutrition, grain processing, food ingredients, and industrial solutions.

During my visit, I had the opportunity to interact with Mr. Amit Kaushik, Director, Dovoy Chemicals India Pvt. Ltd.; Mr. Duttle Bing, General Manager – ASPAC & EMEA, Dovoy Inc. Singapore; Dr. Vipul Gohel, Director, MIV Biosolutions and Channel Partner for Dovoy; Mr. Anand Singh, Business Head – Animal Health; Dr. Sumit Raja, Technical Manager – Animal Health; Mr. Shyam Sunder Sharma, Business Head – DGP; Ms. Dhanashri Shitole, Zonal Sales Manager-South & Maharashtra and Ms. Akanksha Sethi, Dovoy.
Mr. Amit Kaushik highlighted that what truly differentiates Dovoy is its unwavering commitment to innovation, research, and quality. The company operates advanced ISO 17025:2017 accredited laboratories where product development, quality assurance, enzyme assays, thermostability testing, and customized solution development are carried out to meet the evolving needs of modern industries.

Mr. Kaushik further emphasized that Dovoy’s vision extends beyond supplying products. The company is focused on delivering holistic solutions and value-added services to customers. Complimentary amino acid profiling services, supported by their ISO 17025:2017 accredited laboratory, provide customers with greater confidence in feed quality and nutritional accuracy. Dovoy’s state-of-the-art laboratory is equipped with sophisticated technologies including the Agilent HPLC 1260, advanced spectrophotometers, Kjeldahl Distillation systems, Class-II Biosafety facilities, biodigesters, and Neogen Raptor platforms. These capabilities support quality assurance and the development of innovative biotechnology solutions across multiple sectors.

According to Mr. Shyam Sunder Sharma, Dovoy’s expertise in proximate analysis, protease enzyme thermostability testing, aflatoxin reduction solutions, microbial load analysis, amino acid profiling, and advanced enzyme assay testing provides a significant competitive edge. The company adheres to globally recognized standards including ISO, GMP, REACH, Halal, FSSAI, Kosher, ZDHC, and D&B certifications.

In the Animal Health & Nutrition sector, Dovoy offers a comprehensive portfolio of feed additive solutions including enzymes, organic trace minerals, yeast-based products, antioxidants, immune modulators, gut health solutions, toxin binders, acidifiers, and lipid metabolism enhancers. These technologies are designed to improve nutrient utilization, gut health, productivity, and overall farm profitability, as shared by Mr. Anand Singh and Dr. Sumit Raja.

The visit was followed by an engaging podcast hosted by Ms. Dhanashri Shitole and Ms. Akanksha Sethi, where I shared my thoughts on the “Future of the Indian Poultry Feed Industry.” I look forward to its release of this Podcast in the coming days.

The visit provided valuable insights into how biotechnology, innovation, and scientific excellence are shaping the future of animal nutrition and sustainable livestock production. It was inspiring to witness Dovoy’s commitment to developing practical, performance-oriented solutions backed by robust research and field validation.

1. Introduction

1.Moisture and Microbial Proliferation
Water Activity (aw): Microbial proliferation, particularly of fungi and bacteria, is predominantly influenced by water activity rather than total moisture content. Most spoilage microorganisms exhibit optimal growth when water activity exceeds 0.70.
Fungal and Mold Contamination: Elevated moisture levels create a favourable environment for the growth of molds such as Aspergillus, Penicillium, and Fusarium, significantly increasing the risk of mycotoxin production and contamination.
Bacterial Growth: Excessive moisture also promotes bacterial multiplication, including pathogenic species like Salmonella spp., Escherichia coli, and Clostridium perfringens, posing serious risks to feed safety and animal health.

2. Moisture and Microbial Proliferation
2.1 Water Activity vs. Moisture Content
A clear distinction must be made between moisture content and water activity (aw) when assessing feed safety. Moisture content represents the total quantity of water present in feed, typically expressed as a percentage. Conversely, water activity refers to the proportion of free, unbound water available for microbial growth. This means that even feed with a moderate moisture level can have a sufficiently high water activity to support microbial proliferation.
– Bacteria generally require a water activity level greater than 0.90 to sustain growth.
– Molds and yeasts can proliferate at water activity levels as low as 0.70.
– Feed spoilage tends to accelerate when moisture content exceeds 12–13%, though this threshold may vary depending on storage temperature and duration.

2.2 Molds and Mycotoxin Contamination
Mold growth poses a critical threat to feed quality, especially when feed is improperly dried or stored under humid conditions. The following mold species are commonly associated with feed contamination:
– Aspergillus spp. – Known for producing aflatoxins, particularly under warm and humid environments.
– Fusarium spp. – Responsible for producing fumonisins, zearalenone, and deoxynivalenol (DON).
– Penicillium spp. – Produces ochratoxins along with other harmful secondary metabolites.

A key concern is that mycotoxins are chemically stable, remaining in the feed long after the mold itself becomes invisible or inactive, thus posing ongoing risks to poultry health.
 
High moisture conditions also create an environment conducive to bacterial growth, including several significant poultry pathogens:
– Salmonella enterica – A zoonotic pathogen often introduced through contaminated raw materials or during feed processing.
– Escherichia coli – Certain strains are pathogenic and can impair gut health and performance.
– Clostridium perfringens – Associated with necrotic enteritis, a prevalent and economically significant poultry disease.
These bacteria can rapidly multiply in moist, warm feed, especially when storage hygiene is inadequate, leading to feed borne infections and compromised flock health.

3. Impact of Moisture-Induced Contamination on Poultry Health
3.1 Nutritional Degradation
Elevated feed moisture does more than encourage microbial growth—it also leads to the degradation of essential nutrients, compromising the nutritional quality of the feed:
– Vitamins – Fat-soluble vitamins (A and E) and water-soluble B-complex vitamins are particularly prone to degradation due to moisture-related oxidation.
– Proteins and Fats – Exposure to excess moisture can initiate rancidity and protein denaturation, reducing digestibility and nutritional value.
– Enzymes and Additives – Many feed additives, including enzymes, lose their efficacy when exposed to moisture, due to chemical breakdown or loss of activity.
Consequently, even if the feed meets the formulated nutritional specifications on paper, its actual nutrient availability to the bird may be substantially compromised.

3.2 Gastrointestinal Health and Immunity
Contaminated feed directly impacts the gastrointestinal health and immune status of poultry:
– Induces inflammation of the intestinal lining, leading to enteritis.
– Causes dysbiosis, disrupting the balance of beneficial gut microbiota.
– Reduces nutrient absorption efficiency, contributing to malnutrition.
– Weakens the immune system, increasing the susceptibility to secondary infections.
Chronic exposure to mycotoxins further suppresses immunity, reduces the efficacy of vaccinations, and predisposes birds to coccidiosis, respiratory infections, and other opportunistic diseases.

3.3 Productivity and Performance
The long-term consequences of feeding moisture-damaged or contaminated feed include:
– Poor growth rates, increased feed conversion ratios (FCR), and reduced body weight gains.
– Decline in reproductive performance, including lower egg production and decreased hatchability in breeder flocks.
– Higher mortality rates and escalating veterinary expenses due to disease management.
Therefore, moisture control in feed is not only a matter of safety but a direct factor in maintaining poultry productivity, profitability, and overall farm sustainability.

4. Strategies for Moisture Control in Poultry Feed
4.1 Optimal Storage Conditions
Preventing moisture accumulation in feed requires stringent storage management practices:
– Maintain relative humidity (RH) below 65% in feed storage facilities.
– Ensure adequate ventilation and temperature regulation to minimize condensation risks.
– Utilize moisture-resistant packaging, such as sealed bags or properly maintained silos, to protect feed from environmental humidity.
– Implement a first-in, first-out (FIFO) stock rotation system to prevent prolonged storage that could increase spoilage risk.
4.2 Processing and Drying Practices
Proper processing is essential to minimize residual moisture:
– Ensure feed is thoroughly dried during production to target moisture specifications.
– Monitor post-pelleting cooling times to prevent condensation within storage containers.
– Avoid incorporating high-moisture raw materials unless they are specifically treated or stabilized.
4.3 Use of Additives and Preservatives
Incorporating specific feed additives can help mitigate microbial growth and toxin risks:
– Mold inhibitors (e.g., propionic acid, sorbic acid) suppress fungal proliferation.
– Organic acids reduce pH levels, creating an environment less conducive to bacterial growth.
– Mycotoxin binders (e.g., bentonite, activated charcoal, yeast cell wall components) adsorb harmful toxins in the gastrointestinal tract, reducing absorption and toxicity in poultry.
4.4 Monitoring and Testing
Routine quality assurance is critical for early detection of moisture-related issues:
– Use moisture meters for rapid, on-site moisture assessments.
– Conduct periodic laboratory analyses to evaluate microbial load and mycotoxin presence.
– Apply Hazard Analysis and Critical Control Points (HACCP) principles during feed production and storage to systematically identify and control risks.

5. Regulatory and Safety Implications
Global feed safety standards emphasize moisture control as a critical control point (CCP) due to its role in preventing contamination and zoonotic disease transmission. Compliance with international regulations enhances food safety, promotes animal welfare, and improves market access. Key regulatory frameworks include:
– Good Manufacturing Practices (GMP+)
– ISO 22000 – Food Safety Management Systems
– CODEX Alimentarius Guidelines
– EU Feed Hygiene Regulation (EC No. 183/2005).
Adhering to these standards not only ensures compliance but also strengthens consumer confidence and supports export competitiveness in international poultry markets.

6. Conclusion
Effective moisture management in poultry feed is fundamental to ensuring feed hygiene, animal health, and overall food safety. Elevated moisture levels promote the growth of harmful microorganisms and the accumulation of toxic metabolites, leading to severe implications for poultry health, productivity, and farm economics.By adopting preventive strategies in feed production, storage, and quality monitoring, producers can safeguard feed integrity and protect flock performance. Moisture control should be recognized not as an operational expense but as a strategic investment in animal welfare, economic sustainability, and public health protection.