Firm, flexible animal feed gel are prepared by a method comprises the steps of: A. Forming a liquid animal feed at a temperature above ambient temperature; B. Passing the liquid animal feed through a pipe cooled to a temperature below the temperature of the liquid animal feed of step (A) such that the feed solidifies to a stiff, flexible gel while in the pipe; and C. Collecting the gel as the gel exits the pipe. The pipe may be straight or coiled, and it may be cooled through the effect of a cooling jacket or container. The composition of the animal is feed is predominantly water containing at least one gelling agent and at least one source of protein, typically an animal-derived protein such as fish or poultry meal.