Hi Dog Obsessed,
Nice name!
The fats in dry foods start to oxidize pretty quickly and they are going bad before you can see or smell any changes. The less time the bag is open the better. At 4-6 weeks the fats are what scares me and I think that is too long. 2-3 weeks is much better. For storage longer than 2 weeks of an opened bag of dry food I would place it in an air-tight container like an Omega Seal.
I would keep the food in it’s original bag and place it bag and all in the container. The reason is, if you empty the food into the container without the bag the fats in the food will start to build up on the interior walls of the container. Even though you will use up all the food every 4-6 weeks the fat on the walls will keep building up and keep oxidizing.
Good Luck!
