Bunnies don't like Pieris plants I have 2 in my garden that are unprotected from my 2 rabbits. Neither will touch them, even hen the plants is really small. They are evergreen plants with leaves that go red then pink then green and they have very small white flowers in summer. There are lots of different varieties of Pieris with different colour leaves etc.
Most of my other plants they have had a go at if I have left them unprotected
Sometimes I now put chicken wire round the stem and leave it there until the shrub is quite large, by this time they usually can't reach the leaves and flowers :lol:
I haven't come across any more varieties that bunnies won't touch sorry, but hope this helps :wave: