The Tale of the Flopsy Bunnies
It is said that the effect of eating too much lettuce is "soporific."
I have never felt sleepy after eating lettuces; but then I am not a rabbit.
The Flopsy Bunnies, the children of Benjamin Bunny, most certainly are rabbits and they like eating lettuces very much, although their parents being somewhat improvident, they often have to scavenge for them. Sometimes even in McMcregor’s rubbish heap.
One day they find a whole mountain of overgrown lettuces there and eat the lot. They make all the little Flopsy Bunnies very sleepy in the midday sun. Who should this be coming down the garden though, but Mr McGregor himself!