Lentils

Legume · evidence: Contested · on 129 of 2,354 verified labels

Lentils appear on 129 of the 2,354 pet food labels we have verified against the official product label — 5.5% of the corpus. That is 80 dog foods (7.2% of the dog corpus) and 49 cat foods (3.9% of the cat corpus), which makes they substantially more a dog-food ingredient than most discussion admits. Nobody publishes that split because computing it means reading every label.

What it is, and why it is in the food

A pulse (legume) common in grain-free formulas as a protein and carbohydrate source. Lentils are named alongside peas in the FDA's open 2018 investigation into diet-associated canine DCM; the agency grouped 'peas and/or lentils,' which appeared in 93% of reported products. The association remains unproven, no causal relationship has been established, and no recall has been issued. Lentils are otherwise a conventional, digestible ingredient.

The evidence is mixed. Studies disagree, and the honest summary is that the answer depends on context that a label cannot tell you.

How common it is, and where it sits on the label

Ingredients are listed by pre-cooking weight, so position carries information: something in the first five is present in bulk, something near the end is a trace addition. Lentils are in the first five ingredients on 78 of the 129 foods that contain it — 60% — so on those it is a structural part of the recipe rather than an additive.

Every food that contains it, cheapest calories first

Ranked by cost per 1,000 kcal, which is the only price basis that survives different bag sizes and moisture levels. 64 of the 129 foods containing lentils have a matched price; the rest are verified but unpriced.

“Check price” links go to a retailer and we may earn a commission — it does not change what is in this table, which is ranked purely on verified cost per 1,000 kcal. Full affiliate disclosure.

Showing the 12 cheapest of 129. The complete list, including unpriced foods, is in the JSON endpoint.

What actually differs about the foods that use it

Held to one species and one form — dry dog food — so the comparison is not just measuring moisture. 70 verified dry dog foods list lentils; 580 do not. These are medians across those two groups.

Across every food that lists it, lentils sits at position 5 in the ingredient list on a median food. The brands using it most in our corpus are Fromm (30), Canidae (15), Wellness (15), Taste of the Wild (14), Nulo (13). A difference in this table is an association, not a cause: brands that reach for one ingredient tend to make similar formulation choices across the whole recipe.

Comparable foods that do not list it

Most people searching an ingredient name want the other half of the answer: what to buy instead. These are verified dry dog foods — the same species and form as most of the foods above, so the comparison is like for like — that do not list lentils anywhere in their ingredients, cheapest per 1,000 kcal first.

Avoiding one ingredient is rarely a good reason to switch on its own. Use this table the way you would use any other single filter — alongside the AAFCO statement, the protein figure and the recall record, all of which are on each food's page.

What we don’t know

Our figure counts what manufacturers print. An ingredient that arrives inside another component — a preservative already in the fish meal, say — does not have to be declared separately by the pet-food maker, so a count from labels is a floor, not a ceiling. We also cannot see inclusion rate: a label tells you lentils is present and roughly where it sits by weight, never how much.

The gap here is inclusion rate, and it matters more than usual. The FDA’s grain-free/DCM inquiry centres on how much legume is in a food, not whether any is — and inclusion rate is exactly the number a label never prints. Position by weight is the closest proxy available, which is why it is on this page. We do not translate any of this into a score. There is no honest way to weigh one ingredient against a food’s AAFCO substantiation, its recall history and its cost, and sites that do it anyway are making the weighting up.

Sources

• FDA/CVM — Investigation into Potential Link between Certain Diets and Canine Dilated Cardiomyopathy (2022)
• Freeman LM, Stern JA, Fries R, Adin DB, Rush JE. Diet-associated dilated cardiomyopathy in dogs: what do we know? JAVMA 253(11):1390-1394 (2018)
• Prevalence figures: Verified Pet Food Data corpus, 2,354 labels verified against official product labels. Machine-readable, CC BY 4.0.

Related ingredients

• Peas

  On 962 labels (40.9%). Contested.

• Pea protein

  On 266 labels (11.3%). Contested.

• Chickpeas (garbanzo beans)

  On 154 labels (6.5%). Contested.

Frequently asked

All 35 ingredients we found on a real label are indexed on the ingredient hub. To see how these fields are read off a label in the first place, start with how to read a pet food label.