Scavengers roam around and eat dead food. Humans have not traditionally been scavengers, we have been hunters, gatherers, and farmers. Both sets of my grandparents killed their own meat, either by raising animals, hunting, or fishing. They also raised their own gardens and canned the produce.
The vast majority of modern Americans have literally become scavengers. They collect food at stores and restaurants. This is inherently a less stable system as the food chain has become increasingly long, dependent on oil, and vulnerable to crop failure. Urban populations have become completely dependent on others for food.
The United Nations estimates that the world population will rise to 9 billion by 2050. It won’t. The current rice panic is just the beginning. Those do-gooders who feed dependent populations without insisting on population controls are committing crimes against humanity on a scale that dwarfs anything that Hitler could have imagined.
Grow a garden. Store grains.