Purina ONE True Instinct Grain Free With Real Ocean Whitefish Cat Food

6 ingredients in this list are ones we hold sourced evidence on , and 2 of them are genuinely contested rather than merely unpopular online.

• Peas · ingredient 3ContestedA 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.
• Pea protein · ingredient 8ContestedA concentrated protein fraction extracted from peas, used to raise a food's protein content without added meat. As a pea-derived pulse ingredient it falls within the group of legume ingredients examined in the FDA's open 2018 investigation into diet-associated canine DCM; metabolomic work has flagged pea-related compounds, but causation has not been shown.
• Named Meat/Poultry Meal (e.g., Chicken Meal, Lamb Meal) · ingredient 2Well 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.
• Mixed tocopherols (natural vitamin E) · ingredient 6Well supportedA blend of vitamin E forms (alpha-, beta-, gamma-, delta-tocopherol) used as a natural-source antioxidant to slow fat rancidity, commonly chosen as an alternative to synthetic preservatives. EFSA concluded that tocopherol-rich extracts are safe for all animal species and the consumer and are efficacious antioxidants in feed.
• Tapioca · ingredient 4NeutralA nearly pure starch extracted from the cassava root, used as a carbohydrate base and binder in grain-free foods (it is a root starch, not a cereal grain). Because it is almost entirely starch with little protein, tapioca contributes essentially no amino acids and is not implicated in the taurine hypothesis; it was not a highlighted ingredient in the FDA's DCM investigation, which focused on pulses and potatoes.
• Taurine (supplemental) · ingredient 23NeutralA sulfur amino acid that dogs can normally synthesize from methionine and cysteine, so it is not classically essential for them. However, some breeds (e.g., golden retrievers) and some diets are linked to low taurine status and dilated cardiomyopathy: an observational study (Ontiveros 2020) associated non-traditional, largely grain-free diets with taurine deficiency and DCM-consistent echocardiographic changes in golden retrievers, though causation and mechanism remain under investigation.