Start with the WSAVA question
The most useful signal for any dry kibble is whether the company is WSAVA-compliant: employs a board-certified veterinary nutritionist, runs AAFCO feeding trials (not just meets nutrient profiles on paper), and publishes research. In the US the shortlist is Purina, Royal Canin, Hill's, Eukanuba, and Iams. Everything else is marketing until proven otherwise.
Match to life stage
- Puppy — needs "all life stages" or puppy-specific. Large-breed puppies (expected adult weight 50+ lbs) need large-breed puppy food specifically — controlled calcium.
- Adult — any AAFCO-complete adult maintenance from a WSAVA-compliant brand.
- Senior — often marketing more than medicine. A high-quality adult food at slightly reduced calories often works better.
Ingredient-list myths to ignore
- "Named protein first" — tells you little about nutritional adequacy.
- "No by-products" — by-products include organ meats, which are nutritionally valuable.
- "Grain-free" — the FDA's nutritional-DCM investigation is not closed. Unless diagnosed grain allergy, skip it.
What actually matters: feeding trials, board-certified nutritionist on staff, consistent recall history.
Transition slowly
Always transition over 7–10 days. 25%/75% for 3 days, then 50/50, then 75/25, then 100%. GI upset on top of rehoming stress is miserable.