Pet Food Ingredient Directory
Plain-language reference for what each ingredient actually is, how it's regulated, and how common it is in pet food labelling. Sourced from AAFCO ingredient definitions and FDA guidance — not marketing copy.
Proteins
Chicken
Fresh chicken muscle meat, usually deboned, used as a primary protein source in dog and cat food. Contains roughly 75% water by weight in its raw form.
Beef
Muscle meat from cattle, typically sourced from cuts not destined for human food. A primary protein source in many mid-tier and premium dog foods.
Protein Meals
Chicken Meal
Chicken cooked and dried, then ground into a dense, concentrated protein powder. Contains roughly 65% protein by weight compared to fresh chicken's 15-20%.
Fish Meal
Dry, protein-dense meal produced by rendering whole fish. Delivers both protein and omega-3 fatty acids (EPA/DHA) in one ingredient.
Lamb Meal
Rendered and dried lamb protein, concentrated to roughly 55-65% protein by weight. Historically marketed as a "hypoallergenic" novel protein, though widespread use has eroded that status.
Fats & Oils
Grains
Brewers' Rice
Small, broken fragments of milled rice that separate from the whole kernel during processing. A by-product of milling rather than a lower-quality ingredient, though often mischaracterised as a "filler".
Corn
Whole ground corn kernel used as an energy source and carbohydrate binder in kibble. Highly digestible when ground finely enough (~85-90% digestibility in processed form).
Oats
Whole or ground oat grain. Used for both its carbohydrate contribution and its soluble fibre (beta-glucan), which supports stool consistency and moderates glycaemic response.
Barley
Cereal grain used as a carbohydrate source. Lower glycaemic index than rice, and a useful fibre contributor when pearled or hulled.
Wheat
Whole or milled wheat grain. Used for carbohydrate, binding function in kibble extrusion, and (in middlings form) as a fibre source from bran residues.
Legumes
Pea Protein
Concentrated protein fraction extracted from yellow or green peas. Used to boost crude protein percentages on the label cheaply, particularly in grain-free formulas.
Soy
Soybean-derived protein and fibre. Appears as soybean meal (protein), soy flour, or soy hulls (fibre) in a range of commercial pet foods, particularly budget tiers.
Preservatives
Mixed Tocopherols
Natural vitamin E compounds used as an antioxidant preservative to prevent rancidity in fats and oils. The "natural" alternative to synthetic preservatives like BHA, BHT, and ethoxyquin.
Ethoxyquin
Synthetic antioxidant used to prevent fat rancidity. Historically common in fish meal and some pet foods; largely phased out of consumer-facing pet food ingredient lists since the late 2000s but still legal and sometimes present upstream in bulk ingredients.