This happened to me the year ago. If you open a bag of cat food it slowly starts loosing things. So, keep the bags small and closed and they won't have any problem with it.

We wouldnt eat our food if it tasted like cardboard

Edit: im assuming a lot of things and this could clearly not be the case, but I'll leave this comment here for the case someone is as stupid as me and needs to read this

[–] rbos@lemmy.ca 7 points 8 months ago

It's good to get some sealed containers and immediately empty the bag into multiple smaller airtight ones. I think oxidation is the main problem. I surmise that you could purge the containers with dry ice or something before closing it, too.