I wonder if the dose that would give these people similar feeling won't give them also serious radiation sickness (which - from what I understand - was not diagnosed).
Plus, obviously it is not something unheard off. Googling for earless rabbit I got http://www.dailymail.co.uk/sciencete...born-ears.html
(scroll to 6th post for a picture) and http://www.flickr.com/photos/madeleine_/799132044/
on the first page.