this may sound a little kooky but it worked for me as a kid finding rabbits without a dog. As you are walking along, think about this: you're now a rabbit and you have just been informed that a fox or coyote is coming after you. Look around and see where you are gonna hide from him, it's a life or death situation. Now go stomp out that brushy spot you selected to hide in and be ready to shoot. The rabbit is gonna run for his life when he comes out of there.