I think sheep are the most difficult animals for me to communicate with, they are most food-centered, there is not great dimension to them, it is difficult for me to grasp the signals they are sometimes sending out. They experience periods of calm and ease, but are the most anxious of the animals I know, perhaps because they are among the most vulnerable.
Sheep are prey, not predators, they have no real means of defense other than to flock together. I communicate with them through food, Maria uses tone of voice and just being close to them. I have gotten them used to my camera by putting it near them when they eat.