Pet food bags are typically non-biodegradable, as the mainstream material is multi-layer composite plastic (such as PET/AL/PE); only products explicitly labeled as meeting biodegradation standards (e.g., those based on PLA/PBAT) are biodegradable.
Conventional products: The vast majority of commercially available pet food and treat bags use co-extruded PE, aluminum-plastic composites, or nylon composite films. These are designed to be moisture-proof, oxygen-resistant, and freshness-preserving; however, they are not biodegradable and are classified as "other" or "dry" waste.
Biodegradable products: Eco-friendly packaging made from bio-based materials like PLA (polylactic acid) does exist but is not the market standard. Consumers should look for clear labeling (such as "fully biodegradable," the applicable standard number, and degradation conditions).
Key distinction: Labels simply stating "eco-friendly" or "decomposable" carry no legal weight. One must verify the specific material composition and compliance with national or industry standards (e.g., GB/T 38082).