Complete food

A complete food is one that, by its composition alone, supplies all of an animal's daily nutrient requirements for a stated [life stage](/glossary/life-stage), so it can be fed as the sole ration without anything added. This is a legally defined term in the European Union under Regulation (EC) 767/2009, and it is the single most important word to look for on any everyday cat or dog product (Regulation (EC) 767/2009). The contrast is with a [complementary food](/glossary/complementary-food), which only meets requirements when paired with something else and must never be fed on its own as the main diet. The distinction matters more than many owners realise: a surprising share of attractively packaged wet pouches, gourmet toppers, and treat-style products are in fact complementary, and feeding them as a staple can produce slow, hard-to-spot deficiencies. In the United States, the equivalent assurance is delivered through the AAFCO [nutritional adequacy statement](/glossary/nutritional-adequacy-statement), which declares a product complete and balanced and states how that was proven, either by meeting the published [AAFCO](/glossary/aafco) profile or by a [feeding trial](/glossary/feeding-trial). For premium buyers, complete status is the baseline, not a selling point: it is what every reputable staple diet should already be. Quality differences then come from ingredient sourcing, digestibility, and formulation rather than from the complete label itself. See the broader [Petipedia glossary](/glossary) for related label terms.

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General documentary information. For an individual animal, a veterinarian's advice takes precedence over any online content.