I have to tell you, I discovered the most wonderful device in the world this year. The garden scarecrow. I was having wild turkeys and birds steal my raspberries, and rabbits eating my irises and lilies, and last year I had purchased the garden scarecrow on sale, so I tried it this year. You hook it up to a water hose, and when it detects motion it sprays in a large arc. Well, it didn't take long for the birds and the rabbits to get the picture. I move it around and turn it on every few nights, and it has been amazing.
It works with a battery, and just hook it up to a hose. It's not cheap, but no chemicals. I just love it.