In the last couple of years I am having to change what I used to post about canned food, I am running into many issues, including a bunch of low sodium Spam cans that bulged well before the expiration date, Spam is supposed to last indefinitely.
I even have a bulging Tuna can from 2004, and other products like canned peppers.
is your storage area hot?
Maybe the low sodium is a contributing factor? Most bacterium don’t like salt one bit.
I suspect the cans are bulging is because they are made very flimsy these days. Cans are so thin you can bend them with just your thumb. I check cans for dents at the store and put them in the car myself so I know they’re not being thrown around. However, when I get home, a few are dented badly every time. So badly that I have to use them immediately. Those who are stocking foods long term should rotate more often because of this.
I also worry about those items sealed with just a piece of foil such as yogurt, fruit and pet food. Those are too easily compromised. Makes you wonder if the manufacturers are adding a boatload more preservatives to make them seem safe.