Biting the heads off rabbits, chocolate and otherwise

It's a time-honored tradition: every year, the title character of the Sally Forth comic strip bites the ears off her daughter's chocolate Easter rabbit - something that Sally Forth writer Francesco Marciuliano parodied the other day in his Medium Large online comic. The grisly nature of this comic made me realize that the Easter tradition of biting the heads off chocolate bunnies is strangely parallelled in real life, where flesh-and-blood rabbits have a disturbing habit of turning up sans head. You could look up this issue on Google, but I'll save you the trouble and direct you to the top hit for searches related to this phenomenon.

I believe the issue of biting the heads or ears off chocolate rabbits, at least, could be explained by the contention that these parts contain no calories. I wonder if any enterprising candy maker has ever offered a box containing nothing but chocolate ears?