That's pretty dark, but true if you feed them too much. It's the same reason we take down the bird feeder in late autumn, otherwise the birds will stay and freeze instead of flying south.
Updated proverb: "Give a squirrel some bread, and you kill its babies. Teach a squirrel to make bread, and you feed its babies for life"?
my dad grew up during the depression. it was pretty dark. they had to eat squirrels. maybe i can revamp the story for my kids.