Hill's Science Diet · Pet Food Bags
Hill's Science Diet Adult Sensitive Stomach & Skin Chicken Recipe Dry Dog Food
Lower PFAS concern for dry pet food in standard paper bag, but packaging details unverified by brand.
Hill's Science Diet uses conventional paper-based dry food packaging with no public PFAS disclosures or claims. The primary risk would be any grease-resistant or water-barrier coating on the inner bag, common in pet food but typically not disclosed.
Shop Hill's Science Diet on Amazon →Material
paper/cardboard bag with likely polymer inner lining
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 dry dog food is packaged in a paper/cardboard bag with an inner polymer moisture barrier, a standard industry approach for shelf-stable pet kibble. The kibble itself is a cooked extruded mixture of meat, grain, and minerals; once dried to roughly 10% moisture content, the food presents minimal risk of leaching contaminants from the bag lining because the product is not water-based and sits inert in the bag. The paper exterior and polymer liner are food-contact materials, but dry kibble does not activate dissolution or migration pathways the way wet foods or liquids do.
The brand's record and disclosure
Hill's Science Diet is owned by Colgate-Palmolive and has a long history of veterinary formulation and FDA compliance; the brand publishes ingredient lists and has not faced major pet food safety recalls in recent years beyond industry-wide issues (e.g., 2020 aflatoxin alerts affecting multiple brands). Hill's does not make explicit public claims about bag lining materials or PFAS testing on packaging, which is typical for the pet food category and reflects a gap in voluntary disclosure rather than a known compliance failure. The brand's transparency on formula safety (sourcing, testing) is stronger than ingredient labeling on packaging materials.
How it compares in its category
Dry pet food bags are lower-risk than wet canned foods (which use lined metal containers) or fresh-frozen products because the low-moisture kibble does not promote leaching. Hill's occupies the premium/veterinary-backed tier of the pet food market, which generally correlates with stricter ingredient controls and supply-chain oversight than budget brands. Compared to boutique or raw-feed alternatives, Hill's benefits from larger-scale quality assurance, though all dry kibble bags carry the same fundamental packaging uncertainty around inner lining composition.
If you buy it
Store the opened bag in a cool, dry place (standard pantry conditions) or transfer kibble to a food-grade plastic or glass airtight container to extend shelf life and reduce exposure to ambient moisture or air. Do not store near heat sources or sunlight, which can degrade the paper bag and polymer lining over time. Bags are typically safe for 2-4 weeks after opening if left in the original packaging; if storing for longer, decanting to a sealed container minimizes any dust or residual bag off-gassing. Monitor your dog for digestive changes; Hill's Sensitive Stomach formula is designed to be digestible, but individual tolerance varies.
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.”
Polymer lining leachates (BPA, phthalates, or other migrants)
No documented recalls or test reports of leaching from Hill's pet food bags into dry kibble. The low-moisture, non-aqueous nature of kibble makes migration unlikely compared to wet foods, but the specific composition of the inner lining is not publicly disclosed by the brand.
Aflatoxin (mold toxin) in grain or meat ingredients
Hill's has not faced brand-specific aflatoxin recalls in the last 5 years, but this hazard is endemic to the pet food supply and can affect any brand using commodity grains. Storage conditions and supplier monitoring reduce but do not eliminate risk.
Heavy metals (lead, cadmium) in meat or mineral premixes
No specific reports of heavy metal contamination in Hill's Science Diet formulations. The brand sources meat and mineral ingredients through established suppliers, and veterinary-grade formulas typically undergo more rigorous testing than commodity pet food.
Bacterial contamination (Salmonella, E. coli) during manufacturing
Dry kibble has lower bacterial risk than wet or raw foods due to heat treatment during extrusion, but cross-contamination can occur during packaging or storage. Hill's has not reported Salmonella recalls specific to this formula in recent years, but vigilance is warranted if your dog shows digestive upset.
Off-gassing or dust from paper bag or inner lining over time
Prolonged storage in a warm or humid environment may accelerate degradation of the polymer lining, potentially releasing volatile organic compounds (VOCs) that could flavor the kibble or create odors. This is cosmetic/palatability risk rather than a direct health hazard at typical household humidity levels.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 62% 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.