Stable, durable granules with active agents

A process for making a stable granule comprising enzyme for storage in a feed premix comprising choline chloride, the process comprising:

• providing a core material and enzyme, the enzyme being distributed throughout the core material or layered over the core material;
• applying to the core material and enzyme a moisture hydrating material, which is an inorganic salt and which is capable of taking up aqueous liquids, to form a layer that is at least 25% w/w of the stable granule;
• coating the layer of moisture hydrating material with a moisture barrier material which is capable of excluding, preventing or retarding water uptake, to form a coating that is at least 5% w/w of the stable granule,
• the applying step and the coating step being carried out under conditions selected so that the water activity of the stable granule is less than 0.5.