As far as I can tell, the stores in rural TN are still stocked fine. It’s taking a while to get my ordered dry dog food but it’s coming. I will have enough to last a year when it gets here. My little divas don’t eat off the shelf dog food and I make most of theirs. 🙄 The eat the limited ingredient dry (L.I.D.) and I make the wet in the food processor, dry it in the dehydrator, vacuum seal it, and freeze it. If the power goes off, it doesn’t spoil since it’s dehydrated but it keeps better in the freezer when not being used. Soak it a few minutes and it’s normal food.
Same in ‘not-rural’ Tennessee, at least in my part. But I’ve noticed some shifting of products on the shelves. That is to say, the cracker aisle has a smaller section for crackers (the crunchy kind, not people like me) than it had. I keep a pretty good supply of triscuit crackers at home, but only buy when on sale. Of course, today’s sale price is higher than the normal price a few years ago, and like many products, the package is shrinking.
I’ll have to read up on freezing things like milk and butter - two staples that I do use to a great extent.
As for power sources, I’m intrigued by solar w/batteries for the primary essentials (fridge, freezer, small amount of lighting), but the cost of entry is high. Frankly, buying a large solar system would take about 80 years to pay for itself, which is most likely longer than the system would last. But as a backup source, it might have some value.
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