i would of thought it was worms, unless its pellet shot then you would have ta skin it, i wouldnt worry.
people eat rabbits also, if this was true any how we wouldnt eat it would we?
if your still concious about it ask your local butcher about it and ask for a rabbit with fur still.
or go to a local rabbit breeder, if not to feed but to read up on parasites they may carry, if any.
as i aid before people eat them so i cant see them carrying anything nasty, freezing kills all parasites as far as i no.