1. Is it a complete food?
This is the most important line on the pack.
- US: look for an AAFCO nutritional adequacy statement saying the food is “complete and balanced” for a life stage, such as growth, adult maintenance or all life stages.
- UK and EU: “complete” means it can be fed on its own. “Complementary” means it must be fed with other food, which is common for treats, toppers and some wet foods.
2. The name tells you how much of an ingredient is in it
In the US, AAFCO naming rules mean that, broadly:
- “Chicken Dog Food” must be mostly chicken (at least 95% of the product, not counting water).
- “Chicken Dinner”, “Platter” or “Formula” must contain at least 25% chicken.
- “With Chicken” needs only 3% chicken.
- “Chicken Flavor” needs only enough chicken to be detected.
The UK and EU follow similar principles in the FEDIAF labelling code, so “with” an ingredient usually means a smaller amount than a food named after it.
3. The ingredient list
Ingredients are listed in descending order by weight. Fresh meat contains a lot of water, so a meat listed first may weigh less once the food is made than a dry ingredient further down.
4. Analytical constituents (guaranteed analysis)
This shows protein, fat, fibre and moisture (and ash in the UK and EU). To compare wet and dry foods fairly, you need to account for the very different moisture levels.
5. Feeding guide and the real cost
Use the feeding guide to work out how long a pack lasts for your pet, then the cost per day. Feeding guides are a starting point: adjust for your pet’s body condition and activity, and ask your vet if you’re unsure.
Last updated: 13 October 2026
