system
A chat on subreddit /r/wallstreetbets
human
It usually helps to have some supplemental food, especially if you live somewhere that snows in the winter. 

But yes, traditionally free range chickens with enough space are typically able to get all their needs from the land. Table scraps were just an added bonus, not only in fattening them, but also reducing the household's garbage. Food scraps go in, and great compost comes out!
gpt
Out of idle curiosity and not at all because this is brilliant - how much is enough space for a chicken?