interesting to see this thread come up again after such a long time!!

I have since heard that if you cut some old hosepipe into 3-4 ft lengths (needs to be the yellow I think) and paint on eyes and a red mouth and leave several of them around the allotment, and keep moving them each time you visit, then the bunnies think they are snakes and keep away. I have never tried this myself, but will give it a try if I can get hold of some old hosepipe.
We buried the last of our pet bunnies( Tiffy) a couple of days ago- aged 9 ...the last of many we used for breeding (over 15 years )so can't try it out on her. My daughter's pet house rabbit wouldn't know an enemy if it ate him...bounds around ignoring the cats!! So he's not much cop either!
If anyone does try this out, I'd be interested in the results.
Like the idea of ferrett pooh and pee though! Will hunt some out! Good idea!