Dry grains (with a moisture content of 8-10%) are usually extruded and cooked under high heat and pressure. Fat will be sprayed onto food to increase palatability, along with other trace components such as heat sensitive vitamins, which will be destroyed during the extrusion process and may increase.
Canned or wet grains (humidity 75-78%) are typically 3 ounces (85 grams), 5.5 ounces (156 grams), and 13 ounces (369 grams) in size. It will also be sold in the form of aluminum foil bags.
Vegetarian and vegan cat food are sold, and vegetarian cat food must be fortified with nutrients because cats are naturally carnivorous and cannot synthesize these nutrients from plant-based foods, such as taurine and arachidonic acid. Some vegetarian cat food brands indicate that their manufacturers follow AAFCO cat food nutrition standards.