Pet Food Taster. If you ever were the victim of a dare to eat your dog’s food when you were a child, you may have an idea of the “ick factor” professional pet food tasters endure every day. Pet food tasters, many of whom have advanced degrees, taste Fido’s food, evaluating it for improved flavor over the previous version. They also evaluate the food for suitability for each type of animal by determining the nutritional value of the food. Tasters usually spit out the food after tasting, since pet food is not designed to nourish humans.