Merrick · Pet Food Bags
Merrick Purrfect Bistro Grain-Free Sweet Potato Recipe Dry Cat Food
Lower PFAS concern for dry kibble; no grease-resistant coating detected on typical pet food bags.
Merrick's dry cat food comes in a standard paper bag with polymer interior, typical for pet kibble. No aqueous film-forming foam (AFFF) treatment or deliberate grease-resistant coating is known to be applied to this product line.
Shop Merrick on Amazon →Material
Paper/cardboard bag with likely polymer liner
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
food packaging is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
Merrick Purrfect Bistro is packaged in a paper/cardboard bag with a polymer (likely polyethylene) inner liner, the industry standard for dry pet food. The kibble itself is grain-free, formulated with sweet potato, chicken, and fish as primary ingredients. The polymer liner prevents moisture ingress and grease transfer but is not food-contact for the cat; the kibble is the direct contact surface. No grease-resistant coatings (which would raise PFAS concern) are typical in dry pet food packaging since the product is low-moisture.
The brand's record and disclosure
Merrick (owned by Purina/Nestlé since 2015) has not faced major recalls specifically for Purrfect Bistro or its grain-free lines in recent years, though grain-free pet foods faced broader regulatory scrutiny from the FDA around 2018-2019 regarding potential links to dilated cardiomyopathy in dogs (not established as causal). The brand does not publish detailed supply-chain or chemical disclosure statements. No significant hazardous substance controversies are on record for this specific product line.
How it compares in its category
Dry pet food bags are lower-risk than wet foods or treated textiles because the kibble is shelf-stable, low-moisture, and not heated after packaging. Merrick sits mid-to-premium in the dry cat food market. Grain-free formulations are more expensive but not inherently safer or less safe chemically; the packaging and storage conditions matter more. Most brands in this segment use identical cardboard/polymer liner construction.
If you buy it
Store the bag in a cool, dry place (not near heat or direct sunlight) and reseal after opening to prevent oxidation of fats in the kibble, which can degrade nutritional quality over time. The bag liner protects against contamination; do not transfer kibble to heated containers or wash the bag for reuse. Check the production date and use within 6-8 weeks of opening. No special handling for chemical safety is needed beyond standard pet food storage practice.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Aflatoxin or mycotoxin contamination in grain-free formulas
Sweet potato and other plant-based ingredients can harbor molds if sourced or stored improperly; no recalls on this specific product are on record, but grain-free formulas have faced sporadic aflatoxin warnings across the pet food industry. Merrick has not published third-party mycotoxin testing data.
Plastic polymer liner degradation and microplastic shedding
The inner polyethylene liner is not heated and is not direct food-contact for the kibble (kibble does not leach from it). Microplastic risk from the bag is negligible under normal storage; risk would only arise if the bag were heated or damaged and pieces entered the kibble.
Heavy metals (mercury, lead) in fish meal or bone meal
This formula contains fish and chicken as primary proteins; fish meal can accumulate mercury and lead depending on source. Merrick does not publish heavy metal testing results or sourcing certifications for this product, so contamination risk cannot be ruled out but is typical for the category.
Rancidity or oxidative degradation of fats
Dry kibble with fish oil or animal fats can oxidize over time, especially if stored in warm or humid conditions or after opening. This is a quality/palatability issue rather than acute chemical toxicity, but rancid fats may cause digestive upset in sensitive cats.
Taurine adequacy and synthetic additive safety
Grain-free formulas must be supplemented with synthetic taurine (an amino acid essential for cats). Merrick includes taurine in this formula; no evidence of contamination or inadequate levels is on record. Synthetic taurine is chemically identical to natural taurine and is safe at label levels.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 72% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
More pet food bags grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.