Dog Food Exposed To Air. Open the bag carefully so you can roll and hold the top closed with a clip or otherwise reseal the package in. Marty is a controversial figure that has legions of supporters but also a large group that disagrees with him.
It is a good idea to only buy enough food to feed your pet for, at most, a month. The same goes for dog food that contains essential fatty acids, which can oxidize when exposed to air. What starts to happen to dog food as soon as it's exposed to air, and why proper pet food storage is so critical.
Exposure to air, light, hot temperatures and humidity speeds up the rate at which foods degrade.
The best way to store opened cans of cat or dog food is to use a plastic pet food lid that fits the top of the can to prevent moisture loss. Open the bag carefully so you can roll and hold the top closed with a clip or otherwise reseal the package in. In terms of variety, few brands offer. Most kibbles contain gmo ingredients like corn, soy and beets.