Are there any flowers/small shrubs that rabbits don't eat?
Are There Any Flowers/Small Shrubs That Rabbits Don’t Eat
Certified GKH Gardening Expert
Ther are some but keep in mind that they are not 100% foolproof and they will still munch on plants when hungry enough. This list should help: http://www.bhg.com/gardening/pests/animal/editors-picks-top-rabbit-resistant-plants/
Also, you may want to try some of the suggestions from this article: https://www.gardeningknowhow.com/plant-problems/pests/how-to-keep-rabbits-out-of-gardens.htm