A method for the manufacture of an animal feed comprises processing a carbohydrate-containing liquid composition (e.g. molasses) to induce cracking and evaporation and thereby form a concentrated liquid composition. The carbohydrate-containing liquid composition is processed by continuously feeding into a first (input) end 19E of a thin film processor 19, subjecting the carbohydrate-containing liquid composition to cracking and evaporation within the thin film processor and continuously removing the concentrated liquid composition from the second (output) end 19F of the thin film processor. The concentrated liquid composition is then solidified to form the animal feed supplement. The method is particularly suited to the preparation of low moisture blocks having a water content of 1-5%. A system for the manufacture of an animal feed supplement is also provided. The system comprises a thin film processor and one or more of a homogeniser, a heat exchanger and a cooler.