I have a garden and plenty of rabbits in the yard. If you use a fence that has small holes, such as chicken wire or hardware cloth and is at least 3 feet high then you will be fine. Though, I advise using a taller fence to also keep out other animals, such as deer and groundhogs. It is best to put some of the fence in the ground or place bricks next to each other around the fence. This prevents them from digging under if they are desperate. Also, there is rabbit and deer repellent. We use it here and it works well. It does not harm any wildlife and it is safe to use right on vegetables as well, if you grow any. We use it on flowers and vegetables, since deer eat more flowers than rabbits. The repellent smells bad but works very well if used properly. I had to wrangle a groundhog out of the garden one year and never want to have to do that again. We now spray the repellent around the garden as well as on the plants.