A professional who feeds rations of experimental feeds to animals, such as poultry, dogs, and cows, and compiles data on growth, productivity, and health of animals. Responsibilities include:

• Weighs feed rations and livestock and gathers eggs and milks cows.
• Observes livestock to note changes in health and preference for certain foods.
• Records data for evaluation by professional personnel.
• Waters stock and cleans pens.