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Why are there some bags of dog food that have the air removed and others that don’t? I know Solid Gold does this on purpose, but some of the Horizon Legacy/Pulsar/Amicus bags come completely devoid of air (and are therefore a solid brick of dog food until you open the bag) while others come with air in them and more flexible. The expiration date on both are the same for the batch.
Are the ‘shrink-wrapped” bags fresher, or better in any way to your knowledge? I often have my customers ask me about this.
I know Horizon uses a special UV-proof type of material for their bags. I have not noticed any other brand besides Horizon that has both shrink-wrapped and non-shrink-wrapped bags in each batch.
Vacuum packed is better because the oxygen in air starts the process of degrading some of the ingredients in the food. How airless they are has to do with how warm the food was when the bag was sealed. When the food cools, the air contracts, pulling the wrap even tighter.
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