The markets aren't that bad are they?
Having visited both dog food and soup / vegetable factories many years ago my impression was that the pet food factory was very clean and more modern when compared to the human food cannery - but you would want to choose the right factory / brand. Indeed the quality assurance of tuna canning in the early 80's left a lot to be desired with no seam checking systems in place.
I am sure that human food canning practices have improved since the early 80's.
As a complete diet if you are really down on your luck I'd go petfood, but I would be pretty selective in terms of brand. Avoid cans altogether and go for porridge, fresh fruit & veges, lentils, rice, soy etc - you can eat much cheaper & better than canned food.
fresh fruit and veg too expensive, maybe frozen ones, like black and white,and rice.
I can say this, I spend an excruciating amount of money at the supermarket on food due to health concerns (food alleragies force me and significant other to buy fresh, natural and basic foods). We can spend $100 AUD and hold a 2-3 shopping bags of food. Shocking to most people...but after you get in the habit the 6-pack of 2 litre coke, bulk packs of chips and sickly, sugary what-nots that you see at the register before you becomes much more disgusting than the idea of spending more on something that is good for you.
I bought a dog roll/sausage thing for the family hound a few weeks ago, my young daughter was with me, being in a silly mood i commented at the checkout to my daughter did she want mashed potatoes or chips !, look of complete horror on the checkout girls face was priceless.
My daughter wasn't to impressed and i got told off
I was terrified of it and reacted by dictating that I was NOT going to eat it. She played on the idea for what seemed an eternity before dishing it out on dinner plates, walking past the dinner table and setting it in front of the eagerly awaiting dogs.
Talking about getting worried. Was not at all happy.
When I was about 6 I tried our cats tinned food. After knowing how it tasted it always used to amaze me how they'd seem to look forward to it so much.
I think I'd be going the tinned soup and buy a fishing line.
Don't take investment advice from seafood.