wireless deer fence
http://wirelessdeerfence.com/
I have been zapped by this before and let me tell ya, it HURT. Just put this sucker a couple feet from your bush and the deer will lick it and WHAM! They come in packs of 3 for $60 and you just put regular batteries in them once a year and then buy these inexpensive scented baits that go on. (They come with the first order).
So far they are doing ok for me, I hope to double up later with some fencing though.
Aren't they cute ?
I HATE them!
I do feel bad they are hungry though