Just been using the RC anti-rabbit prep - so far very successfully.
I did a small application, half the garden, 1/8th acre of specific places, last Wed 5th Apr at approx 13.00 local time. Since when not a bunny in sight on any of the prepped areas, 2 bunnies came onto the un-prerpped area once in the past week that I saw. Plants in prepped areas are growing well and showing no signs of being eaten by bunnies, and no digging scutts in those areas either. The whole garden appears to be less bunny-friendly as I'm just not seeing them as I did before last Wed. Am going to do the rest of the garden this afternoon, Wed 12th Apr.
Will try to keep you posted on results, and how long it lasts.