I am a rule follower! haha!
I have the bag open just a couple of weeks and keep the product in the original bag as instructed. I want nothing to alter the consistency, nutritional value nor safety of the food.
Their own instructions in the link here:
Frequently Asked Questions - ZiwiPeak focus on what
(Copied in case some cannot open the link)
Just store in a cool dry place. Food should be used within 8 weeks of opening.
Donít put it in the fridge or freezer, as this will change its natural profile over time.
When youíve fed your pet, re-seal the pouch carefully.
Donít store the food out of its safe pouch, as the profile will start to change.
Remember, ZiwiPeak is a true, natural meat product.
As a result, even having 3, I cannot go through an 11 pound bag in 8 weeks time so I stick to 2.2 pound bags.