All Oxbow consumable products (i.e. hay, foods, treats, supplements, etc.) have undergone shelf testing to guarantee the safety, efficacy, and quality of the product for two years from the packaging date as long as the package has not been opened and has been stored appropriately.
The best by/freshest by date on the package represents two years from the time of packaging of that product. Because we have not tested the product past that date to verify efficacy and safety, Oxbow cannot recommend usage of the product after the expiration date has passed.
If you have additional questions or would like more information, please feel free to contact us directly.