In The Flopsy Bunnies, Benjamin Bunny and his cousin Flopsy are the parents of six young rabbits called simply The Flopsy Bunnies. The story concerns how the Flopsy Bunnies, while raiding a rubbish heap of rotting vegetables, fall asleep and are captured by Mr. McGregor who places them in a sack. While McGregor is distracted, the six are freed by Thomasina Tittlemouse, a woodmouse, and the sack filled with rotten vegetables by Benjamin and Flopsy. At home, Mr. McGregor proudly presents the sack to his wife, but receives a sharp scolding when she discovers its actual content.

Modern critical commentary varies. One critic points out that the faces of the rabbits are expressionless while another argues that the c**k of an ear or the position of a tail conveys what the faces lack. One critic believes the tale lacks the vitality of The Tale of Peter Rabbit which sprang from a picture and story letter to a child. Most agree though that the depictions of the garden are exquisite and some of the finest illustrations Potter created.