What to Look for in Dog Food: Ingredients Explained

Vet-reviewed via PetHealth+ · Last reviewed June 2026

Choose foods labelled 'complete' for your dog's life stage. Named meat sources (e.g. chicken, lamb) should appear high on the ingredient list. Avoid foods where vague terms like 'meat derivatives' dominate without clarity.

Complete vs complementary

Complete foods meet all nutritional needs; complementary treats or toppers do not replace meals.

Protein and fat

Active dogs need adequate protein; working breeds may need more. Your vet can advise for medical conditions.

Grain-free caution

Some grain-free diets have been linked to heart disease in dogs — discuss with your vet before switching.

Related: Toxic foods for pets

Frequently asked questions

Is grain-free better for dogs?

Not necessarily — grain-free is not needed unless your vet diagnoses a specific allergy.

What does 'complete' mean on dog food?

The food contains all nutrients a dog needs for that life stage without additional supplements.

Should I rotate dog food brands?

Consistency aids digestion; change gradually over a week if switching.

Are by-products bad?

Quality varies — named organ meats can be nutritious; vague 'derivatives' are harder to assess.