What Moisture Content Should Feed Pellets Be Dried To?

Producers often ask us about the right moisture level after pelleting, and the answer depends on two factors: feed type and how long the product will be stored. We at FAMSUN have tested countless batches across different species and climate conditions to establish practical moisture targets. This article explains post-pellet moisture recommendations for common feed types and how storage duration influences drying requirements.

Why Final Moisture Matters for Feed Quality

Moisture content directly affects microbial stability, pellet durability, and nutritional value. If pellets leave the cooler with too much water, mold and bacteria can develop within days. If they are overdried, energy costs rise unnecessarily, and the pellets become brittle. The ideal range for most finished feed pellets falls between 10.5% and 12.5% moisture. However, specific formulations and storage conditions shift these numbers. A grain dryer or dedicated drying equipment must be adjusted accordingly to achieve consistent results without over-processing.

Moisture Targets by Feed Type

Aquafeed pellets require the lowest moisture, typically 8% to 10%. These dense, high-protein diets sink or float slowly, and excess moisture causes them to disintegrate in water. For poultry feeds, which often contain higher fiber levels, the acceptable range is 11% to 12.5%. Swine feeds perform well at 11% to 12%, provided the storage period stays under four weeks. Ruminant feeds with moderate moisture tolerance can go up to 13% if ventilation is adequate. When we run a grain dryer for corn or wheat intended for feed pellets, we first dry the raw grain to around 14% before grinding and pelleting, then apply a final drying pass to bring pellets down to species-specific targets. Using proper drying equipment after the pellet cooler gives operators fine control over the last few percentage points of moisture removal.

Storage Duration Requirements

Short-term storage of less than two weeks allows slightly higher moisture, up to 12.5% for most poultry and swine feeds, because the product moves quickly before spoilage begins. Medium-term storage of two to six months requires moisture below 11.5% to prevent mold growth in bins or bags. Long-term storage beyond six months—common for export or seasonal feed reserves—demands moisture at 10% or lower, especially in humid climates. For example, a feed destined for tropical regions should be dried with drying equipment to 9.5% to 10% and then stored in sealed liners. FAMSUN has observed that for every 1% of excess moisture above 11%, the safe storage life at 25°C roughly halves. A feed at 13% moisture might spoil in three weeks, while the same feed at 10% stays stable for six months or more.

Practical Tips for Achieving Correct Moisture

Operators should take moisture readings at three points: after the pellet mill, after the cooler, and after any secondary drying equipment. This helps identify where adjustments are needed. We recommend keeping the cooler bed depth consistent and monitoring air flow rates. For production lines handling multiple feed types, programmable controls on FAMSUN drying equipment allow quick changeovers between moisture recipes. Also, remember that ambient humidity affects drying efficiency; on rainy days, you may need to reduce throughput or add a pre-heater to the air intake.

The right final moisture for feed pellets balances spoilage risk against production cost. Pellets for aquafeed should reach 8–10%, poultry and swine feeds 11–12.5%, and ruminant feeds up to 13% only with short storage. Storage duration longer than two months demands moisture below 11.5%, while six months or more requires 10% or lower. By adjusting your grain dryer and drying equipment to these targets, you can deliver stable, high-quality feed. We encourage mill managers to verify their current moisture practices and consider upgrading to systems that provide consistent post-pellet drying for every batch.