I'm stickin' with the Pig

One may purchase three items, no more,
After nine at the Food Lion store.
So our cart, piled with food,
Made the checker quite rude
And she scowled ’til we rolled out the door.

We decided to shop for a basket full of groceries after dinner in town, but what a mistake! We were the only people buying more than three items, and the checkout clerk treated us like pariahs. I guess she wants us to start shopping at Piggly Wiggly?