Acana Highest Protein, Grasslands

6 ingredients in this list are ones we hold sourced evidence on , and 3 of them are genuinely contested rather than merely unpopular online.

• Lentils · ingredient 7ContestedA 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.
• Chickpeas (garbanzo beans) · ingredient 8ContestedA pulse (legume), also called garbanzo bean, used in grain-free foods for plant protein and carbohydrate. Chickpeas are among the pulses (with peas and lentils) cited in the FDA's open 2018 investigation into diet-associated canine DCM.
• Peas · ingredient 9ContestedA pulse (legume) used in many grain-free foods as a plant protein and carbohydrate source. Peas are central to an open FDA investigation, begun in July 2018, into a possible link between diets high in peas, other pulses, and potatoes and canine dilated cardiomyopathy (DCM); 93% of reported products contained peas and/or lentils.
• Named Meat/Poultry Meal (e.g., Chicken Meal, Lamb Meal) · ingredient 4Well supportedA rendered, water- and fat-reduced concentrate from a named species (AAFCO, e.g., 'chicken meal'). Because most moisture is removed it is a dense protein source (poultry meals commonly around 57-69% crude protein) and it names the species for allergy avoidance.
• Fish oil (EPA + DHA omega-3) · ingredient 18Well supportedMarine-source omega-3 fatty acids (EPA and DHA) from fish oil. A randomized, double-blinded controlled trial (Roush 2010) found improved weight-bearing in dogs with osteoarthritis, and a 2022 meta-analysis identified clear clinical analgesic efficacy for omega-3-enriched diets and supplements.
• Prebiotics (chicory root / inulin, FOS) · ingredient 37NeutralFermentable fibers (chicory-derived inulin and fructooligosaccharides) that feed colonic bacteria and are readily fermented to short-chain fatty acids in dogs. Feeding studies show they shift fecal microbiota composition and are well tolerated at typical inclusion levels, but clear health benefits beyond compositional change are not yet established.