Of course not. The answer is simple, according to one chocolate maker: hollow bunnies are easier to eat.
“If you had a larger-size bunny and it was solid chocolate, it would be like a brick; you’d be breaking teeth,” says Mark Schlott, vice-president of operations at R.M. Palmer in Reading, Pennsylvania, one of the first and largest manufacturers of hollow chocolate bunnies.
And, of course, hollow is usually cheaper to make, though Schlott phrases it more delicately: “Hollow has a greater perceived value. It creates a much greater chocolate footprint than solid.”
Well, that answers that, but you'll find the complete history of the chocolate Easter bunny, no matter how hollow, at Smithsonian's Food & Think blog. Link
(Image credit: Flickr user Kerstin Wellekötter)