EU/UK vs US Pet Food Labelling Rules: A Comparison Guide
A pet food label looks different on either side of the Atlantic, but the two systems aim at the same thing: honest, non-misleading information. In the United States, labelling follows FDA requirements plus AAFCO model regulations adopted state by state (AAFCO, 2024). In the United Kingdom, the framework is Regulation (EC) No 767/2009, retained in UK law after Brexit, applied through the FEDIAF code (EUR-Lex, 767/2009; FEDIAF, 2019). This guide compares the two frameworks, decodes the claims they police, "with chicken", "rich in", "grain-free", and explains who actually enforces the rules and what a front-of-pack image is allowed to suggest.
Last updated :General documentary information. For an individual animal, a veterinarian's advice takes precedence over any online content.
How do the US and UK frameworks differ?
Answer capsule. US labelling rests on two layers: federal FDA oversight of safety and basic labelling, plus AAFCO model regulations that most states adopt into law (AAFCO, 2024). The UK applies the retained Regulation (EC) No 767/2009, with the FEDIAF code as industry self-regulation (EUR-Lex, 767/2009). Regulation (EC) No 1069/2009 governs permitted by-products on both sides.
The US system is layered. The Food and Drug Administration oversees safety and basic labelling at federal level, while the American Association of Feed Control Officials publishes a model bill and regulations that individual states adopt into their own law, which is where the detailed ingredient names, the guaranteed analysis and the nutritional adequacy statement come from (AAFCO, 2024).
The UK system is single-instrument but supported by self-regulation. After Brexit, Regulation (EC) No 767/2009 on the marketing and use of feed was retained in UK law, and the FEDIAF Code of Good Labelling Practice operates as the industry reference standard that enforcement bodies treat as authoritative (EUR-Lex, 767/2009; FEDIAF, 2019). Across the Channel, Regulation (EC) No 1069/2009 decides which animal by-products may enter feed. Both systems share one guiding principle: a label must not mislead the buyer.
What does Regulation (EC) 767/2009 require, and is the FEDIAF code law?
Answer capsule. Regulation (EC) No 767/2009 requires the food category, target species, ingredient list by weight, analytical constituents, declarable additives, net weight, durability date, batch number and the responsible operator's details (EUR-Lex, 767/2009). The FEDIAF code is not law: it is industry self-regulation, like AAFCO's model rules, that enforcers treat as the reference standard.
The regulation, in force since 2010 and retained in UK law, harmonises feed labelling and sets the mandatory items that form the common floor of a compliant label (EUR-Lex, 767/2009). Its guiding principle is fairness: no statement may mislead the buyer. The US reaches the same goal through the FDA's prohibition on false or misleading labelling.
The regulation also frames claims tightly. Article 13 prohibits attributing to an ordinary feed a function of preventing, treating or curing a disease, save for framed exceptions such as coccidiostats; particular-nutritional-purpose claims are reserved for dietetic foods under Regulation (EU) 2020/354, which replaced Directive 2008/38/EC (EUR-Lex, 767/2009, art. 13; EUR-Lex, 2020/354). Neither the FEDIAF code nor AAFCO's model regulations are themselves binding law; the binding law is the FDA framework in the US and Regulation (EC) No 767/2009 in the UK, with the codes serving as the reference standard.
What do "grain-free", "rich in" and "with chicken" mean?
Answer capsule. These claims are regulated but of uneven weight. "With chicken" triggers a modest minimum threshold, set at just 3% of the named ingredient under the US "with" rule; "rich in chicken" triggers a higher threshold plus a declared percentage; "grain-free" states only an absence, with no guaranteed benefit (AAFCO, 2024; Tufts Petfoodology, 2021). All require declaring the highlighted ingredient's proportion.
Highlighting an ingredient triggers obligations under Regulation (EC) No 767/2009 and the FEDIAF code, and under AAFCO's named-ingredient rules in the US (FEDIAF, 2019; AAFCO, 2024). The word chosen is not neutral: rising thresholds attach to wordings such as "with", "rich in" or "dinner". A "rich in chicken" product can still contain far less chicken than a buyer imagines, since the threshold can be met without that ingredient dominating the recipe, and in the US the "with" rule sets the bar at just 3% of the named ingredient.
"Grain-free" guarantees an absence and nothing more. The claim states the removal of cereals without promising a nutritional benefit or a lower carbohydrate level, because peas, lentils and potatoes often replace them and keep the starch high (Tufts Petfoodology, 2021). An absence is meaningful only if the removed ingredient was a real problem for the animal; otherwise it mostly answers a buyer's perception rather than a need.
Does the picture of meat chunks match the contents?
Answer capsule. Not necessarily. A pack image is marketing, framed by the fairness principle of Regulation (EC) No 767/2009 and the FDA ban on misleading labelling, but it carries no value as a nutritional declaration (EUR-Lex, 767/2009). The meat pictured is almost always fresh and raw, while the finished kibble holds only its dehydrated fraction. Only the ingredient list and declared percentages tell you the real contents.
An image illustrates a recipe's inspiration, not its quantified composition. It can suggest the star ingredients without overstating their share in a deceptive way, but because the meat shown is fresh and raw while the finished food holds only its dried fraction, the picture sustains an impression of higher content than the product's reality, without being illegal (FEDIAF, 2019).
What to rely on instead are the regulated, verifiable elements: the ingredient list, the declared percentage of any highlighted ingredient, and the analytical constituents converted to a dry-matter basis. Enforcers can sanction a genuinely misleading presentation, but the buyer keeps the simplest check of all, which is to read the back of the bag rather than the front.
What does "complete food" guarantee under each system?
Answer capsule. Under both, "complete food" (US: a product meeting the AAFCO nutritional adequacy statement) guarantees the recipe covers every essential nutrient for the stated species and life stage and can be the sole ration (FEDIAF, 2021; AAFCO, 2024). It attests to balance, not ingredient quality or digestibility. It is a safety floor, not a ranking verdict.
The claim rests on nutrient profiles: the FEDIAF profiles in Europe and the UK, the equivalent AAFCO profiles in the US, which set minima and maxima per nutrient, species and stage (FEDIAF, 2021). Two routes demonstrate compliance: a formulation calculated to meet the profile, or validation by a feeding trial on animals, which WSAVA values as the higher level of proof (WSAVA, 2021). The US adequacy statement also names which route was used, a distinction many buyers never notice.
What the claim does not tell you is just as important. It judges neither digestibility, nor the origin of the ingredients, nor the maker's expertise, so a food can be "complete" while being only moderately digestible or formulated without a qualified nutritionist (WSAVA, 2021). Read it as confirmation that the food can stand alone for the stated stage, then apply the other quality criteria on top.
Can a "complementary" food replace a meal?
Answer capsule. No. A complementary food does not, on its own, cover the full set of an animal's needs, and fed as the main ration it risks deficiencies or imbalances (Regulation (EC) No 767/2009). Treats and supplements should stay a top-up, generally capped at around 10% of daily energy intake (WSAVA, 2021). Only a "complete" food can be the sole meal.
A product labelled "complementary food" is incomplete as a sole ration by regulatory definition (Regulation (EC) No 767/2009). Treats, topper wet foods and supplements are designed to accompany a complete food, not replace it, and permanently substituting a meal with one creates a real nutritional risk. Feeding a cat only canned tuna marketed "for cats", often a complementary food, can cause deficiencies, notably in calcium and vitamin E (WSAVA, 2021).
The place for these products is limited and additive. Treats and supplements should stay a top-up, generally kept to about 10% of daily energy intake so as not to unbalance the ration or drive weight gain (WSAVA, 2021). The main meal always rests on a complete food suited to the species and life stage; the complementary food comes in addition, never instead. The label states the category, so the check is quick.
EU/UK vs US labelling at a glance
The table sets the two frameworks side by side on the elements buyers most often compare: the governing instruments, the mandatory blocks and the status of the industry codes.
| Element | EU / UK | United States |
|---|---|---|
| Binding law | Reg. (EC) 767/2009 (retained) | FDA framework + state-adopted AAFCO rules |
| Industry code | FEDIAF code (self-regulation) | AAFCO model regulations (self-regulation) |
| Nutrient block | Analytical constituents | Guaranteed analysis |
| Adequacy signal | "Complete food" category | Nutritional adequacy statement |
| Permitted by-products | Category 3 (Reg. 1069/2009) | FDA / AAFCO oversight |
The table shows convergence beneath the different vocabulary: both require an ingredient list by weight, a nutrient block, a species and an adequacy signal, and both forbid misleading the buyer.
A clear recommendation for reading across borders
The recommendation is to read for the function of each item, not its local name. Whether a label says "analytical constituents" or "guaranteed analysis", it is the same block of guaranteed bounds, expressed as-fed, to be converted to a dry-matter basis before comparing (AAFCO, 2024). Whether it says "complete food" or carries a nutritional adequacy statement, it is the same safety floor for a stated life stage (FEDIAF, 2021).
Treat the regulated elements as reliable and the marketing layer as suggestion. Mandatory items, the category, species, ingredient list, nutrient block and operator details, are comparable across both systems and form a faithful skeleton (EUR-Lex, 767/2009; AAFCO, 2024). Claims such as "with", "rich in" and "grain-free" are real but uneven, and a front-of-pack image commits nothing about the contents.
Finally, know who to turn to. Front-line enforcement falls to state feed control officials in the US and Trading Standards in the UK, while science agencies such as the FDA's Center for Veterinary Medicine and EFSA assess risk and additives rather than policing pack marketing (AAFCO, 2024). For an unjustified claim, the enforcers are the route; for the contents, the back of the pack remains the buyer's most reliable tool.
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Related questions: How do US and UK rules govern pet food labelling? | What do "grain-free", "rich in" or "with chicken" mean in regulatory terms? | Who actually checks the marketing claims on a bag of kibble?
Glossary: Regulation (EC) 767/2009 | grain-free
Hub: Reading and decoding a label
Sources: Regulation (EC) No 767/2009 and Regulation (EC) No 1069/2009 (EUR-Lex; retained in UK law); Regulation (EU) 2020/354 on dietetic feed (EUR-Lex); FEDIAF Code of Good Labelling Practice (2019) and Nutritional Guidelines (2021); AAFCO, Understanding Pet Food (2024); US FDA Center for Veterinary Medicine; WSAVA Global Nutrition Guidelines (2021); Tufts Petfoodology (2021).