Pet Food Ingredient Directory

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.

Salmon

Fresh salmon muscle used as a primary protein in many fish-based pet foods. Provides natural omega-3 fatty acids (EPA and DHA) alongside the protein.

Duck

Duck is sometimes marketed as a "novel" protein for food-sensitive dogs — but poultry cross-reactivity through serum albumin makes it a poor first swap for chicken-allergic dogs.

Venison

Novel protein from deer. Like rabbit, venison is genuinely unfamiliar to most commercially-fed dogs and works well as an elimination-diet protein.

Kangaroo

True novel protein sourced from wild-harvested Australian kangaroo. Very few dogs have prior exposure, which makes kangaroo-based elimination diets diagnostically reliable.

Egg

Whole egg used as a protein and binder in pet food, typically listed as "dried egg product" on ingredient panels. Contains ovalbumin, ovomucoid, and conalbumin — proteins that cause most egg allergies.

Hydrolyzed Chicken

Chicken protein enzymatically broken down into fragments too small to trigger most allergic reactions. Used in veterinary Rx hypoallergenic diets (e.g. Hill's z/d, Royal Canin Hydrolyzed Protein HP).

Hydrolyzed Soy

Soy protein broken into peptide fragments. Used as the primary protein source in several Rx hypoallergenic formulas, notably Royal Canin Ultamino and Purina Pro Plan HA.

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.

Turkey Meal

Rendered turkey concentrated to a protein-dense meal — similar production process and protein content to chicken meal, but sourced from turkey carcasses.

Salmon Meal

Concentrated, dried salmon protein — provides roughly 60% protein and contributes EPA/DHA if not extensively defatted. Denser protein source than fresh salmon because water is removed.

Rabbit Meal

Novel-protein meal sourced from rabbit, genuinely uncommon in the mass-market pet food supply so most dogs have no prior exposure. Widely used in elimination diets.

Beef Meal

Concentrated dried beef protein — roughly 55-65% protein by weight. Same ingredient category as chicken meal but from beef carcasses.

Chicken Fat

Rendered fat from chicken tissue. Provides palatability, essential fatty acids (linoleic acid in particular), and concentrated calories. Appears in most mainstream kibbles, including many "chicken-free" lines.

Salmon Oil

Extracted oil from salmon — the standard supplemental source of EPA and DHA in pet food. Contributes to coat quality and skin barrier function; often added at the end of manufacturing to preserve fatty-acid integrity.

Fish Oil

Concentrated source of EPA and DHA omega-3 fatty acids, commonly added to pet foods and as a stand-alone supplement for coat quality, inflammation control, and joint support.

Flaxseed Oil

Plant-source omega-3 oil — provides alpha-linolenic acid (ALA), which dogs convert to the active EPA and DHA forms at low efficiency (~5-10%).

Canola Oil

Plant-source oil derived from canola (a cultivar of rapeseed). Used in pet food as a cost-effective fat source and linoleic acid contributor.

Tapioca

Starch extracted from the cassava root. Used in grain-free pet foods as a binder and carbohydrate source — functionally similar to corn or wheat starch but not a cereal grain.

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.

Peas

Whole peas used as a protein and carbohydrate contributor in grain-free pet foods. Distinct from pea protein isolate — whole peas include the starch and fibre fractions.

Lentils

Pulse legume used as a protein-and-carb contributor in grain-free formulations. Alongside peas and chickpeas, lentils are the characteristic starch ingredient in modern grain-free kibble.

Chickpeas

Pulse legume used in grain-free foods for protein, fibre, and carbohydrate contribution. Appears increasingly in premium grain-free formulas as an alternative to peas.

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.

Sweet Potato

Carbohydrate and fibre source commonly used in grain-free pet foods as a starch alternative. Provides beta-carotene, vitamin C, and soluble fibre.

Pumpkin

Pumpkin provides soluble fibre and moisture without a meaningful allergen profile. Widely used therapeutically for mild digestive upset — the soluble fibre firms soft stools and can relieve mild constipation.

Beet Pulp

Fibrous residue left after sugar extraction from sugar beets. Moderately fermentable — provides both soluble and insoluble fibre, which supports stool consistency and colonic health.

Chicory Root

Source of inulin — a prebiotic soluble fibre that feeds beneficial gut bacteria (particularly Bifidobacterium). Used in pet foods targeting gut health and stool consistency.

Psyllium

Soluble-fibre supplement derived from Plantago ovata seed husks. Gold standard for firming soft stools in dogs — absorbs water in the colon to bulk and firm the stool without fermentation gas.

BHA

Synthetic antioxidant used to prevent fats from going rancid. One of the most controversial pet food ingredients — legally permitted under FDA and AAFCO but associated with concerns in long-term rodent studies.

BHT

Synthetic antioxidant preservative, often paired with BHA. Like BHA, it prevents fat rancidity and has an extended effective preservation window compared to natural alternatives.

Rosemary Extract

Natural antioxidant preservative extracted from Rosmarinus officinalis leaves. The default "natural" alternative to BHA, BHT, and ethoxyquin in premium pet food.

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.

Guar Gum

Natural thickener and binder derived from guar bean seeds. Used in wet pet food to create the gravy or jelly texture that holds protein chunks in suspension.

Xanthan Gum

Polysaccharide produced by bacterial fermentation of sugar, used as a thickener and stabiliser in wet pet food. Gives products a smooth, consistent texture and prevents separation.

Carrageenan

Seaweed-derived thickener used almost exclusively in wet pet food. Two forms exist: food-grade ("undegraded") carrageenan, approved by FDA, and poligeenan ("degraded" carrageenan), which is not food-grade.

Natural Flavor

Generic label term for a palatability additive that must be derived from animal or plant tissue under AAFCO rules — typically a rendered animal digest that boosts palatability. The source is rarely disclosed on the label.

Taurine

Essential amino sulfonic acid for cats (who cannot synthesise it) and conditionally essential for dogs. Critical for cardiac muscle function — deficiency causes dilated cardiomyopathy (DCM).

Glucosamine

Joint-support supplement sourced from shellfish shells or fermentation. Commonly added to pet food for joint health, particularly in large-breed, senior, and mobility-formulated diets.

Chondroitin

Joint-support supplement typically paired with glucosamine. Sourced from cartilage (bovine, porcine, or marine). Targets cartilage maintenance and joint lubrication.

Probiotics

Live bacterial cultures added to pet food or fed as a supplement to support gut-microbiome diversity. Common strains in pet products: Enterococcus faecium SF68, Bifidobacterium animalis, Lactobacillus acidophilus.