[clee1]

Practically forever.

[Tilted Irish Kilt]

Jamestown1630 : Does anyone have a ball-park idea of how long dry pet food can last if it’s vacuum-packed and stored in pest-proof containers?

Vacuumed sealed products will last for several years, provided it doesnt contain any meat oils.
Oils of any kind will turn rancid after a bit of time.
Best bet is to vacuum seal in mylar plastic , as it inhibits oxidation, and can last several years.