Dog food types
How long does opened dog food last?
Last updated 23 September 2026 · How we write and check this
Short answer
An opened bag of dry kibble generally stays fresh for 4 to 6 weeks if properly resealed and stored in a cool, dry place, while opened wet food should be refrigerated and used within 2 to 3 days, so the safe window depends heavily on which format you are storing.
Why dry food's window is measured in weeks
Once a bag is opened, the fat coating on kibble begins to oxidize on exposure to air, gradually turning rancid even if the food still looks and smells fine at first glance, which is why the 4 to 6 week guideline exists regardless of the printed best-by date.
Why wet food's window is measured in days
An opened can behaves like any perishable food once exposed to air and refrigerator temperature, and bacterial growth becomes a real concern beyond 2 to 3 days even when kept properly chilled and covered.
Making the most of the full window
Transferring dry kibble to an airtight container, or at minimum rolling and clipping the bag tightly, and always refrigerating opened wet food promptly rather than leaving it on the counter, helps you reach the full safe storage window rather than falling short of it.
Key takeaways
- Opened dry kibble is generally good for 4 to 6 weeks if sealed properly and stored well.
- Opened wet food should be refrigerated and used within 2 to 3 days.
- Proper sealing and prompt refrigeration help you reach the full safe window for each format.