Skip to main content
Sniff
Purina ONE +Plus Adult Joint Health Formula Dry Dog Food, 31.1-lb bag
Purina ONE

+Plus Adult Joint Health Formula Dry Dog Food, 31.1-lb bag

Evidence Fair
dry adult maintenance $1.61/lb

Purina ONE +Plus Adult Joint Health Formula Dry Dog Food, 31.1-lb bag earns a Sniff Score of 66/100 (B) with Fair evidence. Zero controversial ingredients flagged. Reasonable protein quality. chicken delivers solid amino acid coverage..

Graded by The Sniff System

Why this score

Reasonable protein quality. chicken delivers solid amino acid coverage.

PQI

Quality fat sources: named fat with marine oil (EPA and DHA source).

FQI

AAFCO feeding trial substantiation for adult maintenance.

ACF

Controversial ingredients · 1

  • sodium selenite
    Synthetic selenium source. Selenium is essential, but sodium selenite has a narrower safety margin than organic alternatives like selenium yeast. Better-formulated foods use the organic form.

Every flagged ingredient has a published basis (confirmed harm / regulatory action / precautionary). See methodology →

Guaranteed analysis
Dry-matter protein: 31%
Protein
27%
min (as fed)
Fat
12%
min (as fed)
Fiber
11.5%
max (as fed)
Moisture
12%
max
Ingredients

Read why each ingredient is good or bad for dogs.

31 total
Good Neutral Watch Flagged
  1. 1
    chicken

    Real meat. Primary protein source, with the amino acid profile dogs actually evolved to eat.

  2. 2
    chicken by-product meal

    Ground organs, bone, and tissue. Nutritionally dense, especially the liver and gizzard fractions. Named species ('chicken') is what matters. Generic 'poultry by-product meal' is the one to worry about.

  3. 3
    rice

    Generic rice. Could be white or brown, the label doesn't say. Brown rice would be specified if it were.

  4. 4
    wheat

    Whole wheat. Fine for most dogs, though a portion are sensitive. Not a quality concern, just a fit-for-your-dog question.

  5. 5
    soybean meal

    Concentrated soy protein. Cheap plant protein that pads the label number, common in budget formulas.

  6. 6
    whole grain corn

    Whole corn with the kernel intact. Decent fiber and B vitamins, though it can crowd out meat in cheaper recipes.

  7. 7
    corn protein meal

    Concentrated corn protein. Similar in role to corn gluten meal, pads the protein number on the label without matching meat amino acids.

  8. 8
    beef fat preserved with mixed tocopherols
  9. 9
    oat meal

    Alternate spelling of oatmeal. Gentle whole grain, steady carb energy, soluble fiber.

  10. 10
    fish oil

    Concentrated omega-3s. The reason 'EPA' and 'DHA' get to show up on the bag.

  11. 11
    natural flavor

    Legal term for animal-derived flavoring, usually hydrolyzed liver or broth. Adds taste, says nothing about quality.

  12. 12
    glycerin

    Humectant used in soft-moist foods to keep them chewy. Safe in moderation but a signal of a processed semi-moist product.

  13. 13
    mono and dicalcium phosphate

    Source of calcium and phosphorus. Standard inclusion in complete dog foods.

  14. 14
    salt

    Sodium chloride. Required at small doses for normal physiology. Not a quality concern in standard amounts.

  15. 15
    malted barley extract
  16. 16
    calcium carbonate

    Source of calcium. Functional. Required in complete dog foods, especially those without bone-in meat meals.

  17. 17
    potassium citrate

    Source of potassium. Sometimes added in urinary-support formulas to help manage urine pH.

  18. 18
    carrots

    Real vegetable. Fiber, beta-carotene, and a small amount of antioxidant value.

  19. 19
    dried peas

    Cheap protein bulk. Fine in small amounts, but when peas stack with lentils and chickpeas in the top ingredients, it's the pattern the FDA flagged in its heart-disease investigation. See why →

  20. 20
    choline chloride

    Essential nutrient for liver and brain function. Standard inclusion in complete dog foods.

  21. 21
    zinc sulfate

    Inorganic zinc. Effective at AAFCO doses but less well-absorbed than chelated forms like zinc proteinate.

  22. 22
    ferrous sulfate

    Inorganic iron. Standard mineral source. Iron proteinate is the gentler, better-absorbed premium form.

  23. 23
    manganese sulfate

    Inorganic manganese. Functional but less well-absorbed than the chelated proteinate form.

  24. 24
    copper sulfate

    Inorganic copper. Standard, effective at small doses. Premium formulas tend to use copper proteinate instead.

  25. 25
    calcium iodate

    Source of iodine for thyroid function. Functional, required in complete formulas.

Showing first 25 of 31. Position 1-5 has the largest weight in the recipe.

23 of 25 ingredients have a curated note. Coverage grows over time.

AAFCO statement

Animal feeding tests using AAFCO procedures substantiate that Purina ONE Joint Health Formula provides complete and balanced nutrition for maintenance of adult dogs.