Hill's Science Diet · Pet Food Bags
Hill's Science Diet Adult Perfect Weight Dry Dog Food
Lower-risk dry pet food packaging; standard paper bag without known PFAS-linked treatments.
Hill's Science Diet dry dog food comes in a conventional kraft paper bag typical of the pet food industry. No known application of water- or grease-resistant coatings that would trigger PFAS concern on this product type.
Shop Hill's Science Diet on Amazon →Material
Paper/cardboard bag with typical food-grade interior coating
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
Hill's Science Diet Adult Perfect Weight is packaged in a multi-layer paper/cardboard bag with a food-grade interior coating, typical of mainstream pet food. The interior coating (usually kraft or polyethylene-lined) prevents moisture penetration and product degradation. This material is designed to contain dry kibble and is not intended for heating or direct food contact beyond ambient storage. The bag structure prioritizes product freshness over consumer safety concerns present in other food packaging formats.
The brand's record and disclosure
Hill's Pet Nutrition (owned by Colgate-Palmolive) is subject to FDA pet food compliance and regularly publishes ingredient sourcing statements and recalls on its website. The brand does not publicly disclose PFAS testing or treatment of packaging but maintains no known record of PFAS-linked recalls for this product line. Hill's has faced isolated recalls for contamination (e.g., aflatoxin in 2006) but these were manufacturing rather than packaging-related. The company's transparency on ingredients is standard for the pet food industry but packaging-specific hazard disclosure remains limited across the sector.
How it compares in its category
Hill's dry pet food bags are representative of mainstream commercial packaging and carry no known safety disadvantage versus competitor brands (Purina Pro Plan, Royal Canin, Iams). Most major dry pet food brands use paper/cardboard bags with polyethylene or kraft interior liners, making this a category norm rather than a differentiator. Premium or boutique brands sometimes use alternative barriers but do not eliminate the underlying material class. This product sits in the middle of the safety spectrum for pet food packaging, not an outlier.
If you buy it
Store the unopened bag in a cool, dry location away from direct sunlight and moisture to prevent coating degradation and product staleness. Once opened, transfer kibble to an airtight food-storage container (glass or food-grade plastic) to prevent oxidation and pest access; do not leave kibble in the original bag. Check the bag seam and interior coating for tears or moisture before purchase. Discard the bag once empty; do not repurpose it for food storage due to potential micro-damage to the interior lining that may not be visible.
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.”
Interior coating leachables (polyethylene or kraft sealant)
Food-grade interior coatings in pet food bags are regulated for indirect food contact and no reported leaching into dry kibble has been established. Leaching would require moisture activation, which dry kibble storage does not provide.
Moisture barrier degradation over time
The paper/cardboard exterior can absorb ambient humidity and degrade the interior coating seal over months of storage, risking product staleness and mold growth rather than direct chemical hazard. This is a product-quality issue, not a packaging safety hazard.
Ink or printing residues on exterior
Pet food bag printing is typically exterior-only and separated from kibble by the interior liner. No established risk of ink migration into the product has been documented for commercial pet food bags.
Bacterial or mold contamination during storage
If the bag is stored in humid conditions or damaged, the interior coating may allow moisture ingress, creating an environment for mold growth. This is a storage and handling issue, not an inherent packaging defect, and is preventable with proper storage practices.
Microplastic fragments from bag degradation
Paper-based bags do not shed microplastics during normal storage of dry kibble. This hazard applies to plastic films or multilayer bags under heat or UV exposure, which does not occur with standard dry pet food storage.
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.