That food thing... Mom and I used to check trash cans when we were hungry. It wasn't the same back then because there was much less packaged food. You'd see sandwiches wrapped in paper, potato salad on a paper plate, etc.
Potato salad used to be a thing with real mayonnaise and I got food poisoning from it. I've told my kids many times that I'm not mad at potato salad, it's just that it has never passed my lips again and never will. It became a famous saying in our family: "That's potato salad to Baldy." Translation: I'm done with that and never coming back to it.
I know this sounds strange to almost everyone, but dog food was great for us. It was cheap, it stored well, it didn't spoil, it tastes fine, and much healthier than what we feed children. So we could eat it without getting cavities because there are no dentists when you're homeless.
They allow dogs at various places I've worked and sometimes I'll sample the dog food out of curiosity. When people see me to that they just freak the heck out. Loud screams of EWWWW!!! THAT'S DOG FOOD!! It must be some cultural thing from people who haven't tasted it. Dog food sure beats potato salad.