We have lots of deer in our neighborhood and have tried just about everything (short of building a fence) to keep them from destroying our shrubs, fruit trees, vegetables and flowers, including dog hair, people hair, and noisy hanging aluminum pans. What's worked the best is the rotten egg and garlic mix Longhunter mentions. My husband mixes it up with water and I spray it on the plants the deer like best after every hard rain. Just don't spray when it's windy. This stuff really stinks!